A cardiovascular detection method and system

Abstract

The present invention discloses a cardiovascular detection method and system, which relate to the field of medical detection technology. The main scheme is: collecting multiple data of a person to be detected; calculating heart rate evaluation values, heart rhythm indicators, blood pressure abnormality reference values ​​and pulse wave conduction velocity based on the multiple data, further obtaining comprehensive cardiovascular indicators, and presetting thresholds to determine whether the cardiovascular system is in a risky state; calculating the cardiovascular reserve index, and then calculating the cardiovascular health index, and presetting thresholds to determine the cardiovascular health level; this method can comprehensively and systematically evaluate the cardiovascular state, timely discover risks and distinguish health levels, and provide a strong basis for the prevention and diagnosis of cardiovascular diseases.

Description

Technical Field

[0001] The present invention relates to the field of medical detection technology, and in particular to a cardiovascular detection method and system. Background Art

[0002] Cardiovascular disease is one of the major diseases that pose a serious threat to human health worldwide today. With the change of people's lifestyles and the aging of the population, the incidence and mortality of cardiovascular diseases are increasing year by year. Accurate and timely detection of the cardiovascular system is essential for the early prevention, diagnosis and treatment of diseases. However, existing cardiovascular detection methods often have problems such as complex operation and inaccurate test results, which to some extent affects the effective prevention and control of cardiovascular diseases.

[0003] Currently, existing cardiovascular testing technologies include a variety of methods. Blood pressure measurement is one of the most common testing methods, which measures arterial blood pressure to evaluate the function of the cardiovascular system. The level of blood pressure reflects the comprehensive situation of the heart's pumping function and blood vessel elasticity. When the heart contracts, systolic pressure is generated, and when the heart relaxes, diastolic pressure is generated. The blood pressure value can be used to determine whether the cardiovascular system is in a normal pressure range.

[0004] Although existing technologies have played an important role in cardiovascular testing, they still have some shortcomings. Although blood pressure measurement is simple and easy, a single measurement result cannot fully reflect the long-term stability of the cardiovascular system. Moreover, normal blood pressure does not necessarily mean that cardiovascular function is completely normal. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a cardiovascular detection method and system, which collects multiple data of the person to be detected; calculates the heart rate, heart rhythm index, blood pressure abnormality reference value and pulse wave conduction velocity based on the multiple data, further obtains the comprehensive cardiovascular index, and presets a threshold to determine whether the cardiovascular system is in a risky state; calculates the cardiovascular reserve index, and then calculates the cardiovascular health index, and presets a threshold to determine the cardiovascular health level, thereby solving the problems of inaccurate data collection, single evaluation index and low detection efficiency.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A cardiovascular detection method, comprising:

[0009] Collecting the electrocardiogram signal data, blood pressure signal data and pulse wave signal data of the person to be tested;

[0010] Calculate the heart rate evaluation value HR based on the ECG signal data; calculate the heart rhythm index RI based on the heart rate evaluation value HR and the ECG signal data; calculate the abnormal blood pressure index PCR and the abnormal blood pressure index BAC based on the blood pressure signal data, and calculate the abnormal blood pressure reference value PBH based on the abnormal blood pressure index PCR and the abnormal blood pressure index BAC; calculate the pulse wave velocity PWV based on the blood pressure signal data and the pulse wave signal data;

[0011] Calculate the cardiovascular comprehensive index SQI based on the heart rate assessment value HR, heart rhythm index RI, blood pressure abnormality reference value PBH and pulse wave velocity PWV; preset a cardiovascular comprehensive index threshold set, compare the cardiovascular comprehensive index SQI with the cardiovascular comprehensive index threshold set, and judge whether the cardiovascular system is in a risk state based on the comparison result; if the cardiovascular system is in a risk state, issue an alarm;

[0012] If the cardiovascular system is in a normal state, the cardiovascular reserve index CRI is calculated based on the ECG signal data and the comprehensive cardiovascular index SQI; the cardiovascular health index CHR is calculated based on the cardiovascular reserve index CRI; the cardiovascular health index threshold is preset, the cardiovascular health index CHR is compared with the cardiovascular health index threshold, and the cardiovascular health level is determined based on the comparison result.

[0013] In the preferred embodiment of the above cardiovascular detection method, the method for calculating the heart rate evaluation value HR is:

[0014] ECG signal data includes cardiac cycle duration t under different detection conditions k，i and the average cardiac cycle duration ta k ;

[0015] According to the cardiac cycle duration t k，i and the average cardiac cycle duration ta k , calculate the heart rate assessment value HR, the calculation formula is: ; where t k，i is the duration of the i-th cardiac cycle in the k-th detection state, k is the serial number of different detection states, and its value is [1, 3], i is the serial number of the cardiac cycle, and its value is [1, n]; n is the number of detected cardiac cycles, and its value is a positive integer; ta k is the average cardiac cycle duration in the kth detection state.

[0016] In the preferred embodiment of the above cardiovascular detection method, the method for calculating the heart rhythm index RI is:

[0017] ECG signal data also includes interval value RR j and the interval average RRA;

[0018] According to the heart rate evaluation value HR, the average cardiac cycle duration ta k , interval value RR j The heart rhythm index RI is calculated based on the average value of the interval RRA, and the formula is: ; Among them, RR j is the jth interval value, j is the sequence number of the interval value, and its value is [1, m]; m is the total number of interval values, and its value is a positive integer.

[0019] In the preferred embodiment of the above cardiovascular detection method, the method for calculating the abnormal blood pressure reference value PBH is:

[0020] Blood pressure signal data includes the systolic blood pressure value SBP of the historical detection cycle d , diastolic blood pressure value DBP d , the actual measured values ​​of different biochemical indicators BO k And the current systolic blood pressure SBP1, diastolic blood pressure DBP1, the previous systolic blood pressure SBP0 and diastolic blood pressure DBP0;

[0021] According to the heart rate assessment value HR, systolic blood pressure value SBP d , diastolic blood pressure value DBP d and the actual measured value BO k , calculate the abnormal blood pressure index - PCR, the calculation formula is: Among them, SBP d DBP is the systolic blood pressure value obtained during the dth routine blood pressure measurement, where d is the routine blood pressure measurement number, and its value is [1, M], where M is the total number of routine blood pressure measurements; d is the diastolic blood pressure value obtained during the dth routine blood pressure measurement, BO a is the actual measured value of the a-th biochemical indicator, a is the serial number of the biochemical indicator, and its value is [1, ri], ri is the total number of biochemical indicator types; BO a，ref is the normal reference value corresponding to the a-th biochemical index; W1 is Weight coefficient, the value is 0.2~0.4; W2 is The weight coefficient is 0.3~0.5; W3 is The weight coefficient is between 0.1 and 0.5;

[0022] According to the current systolic blood pressure SBP1, diastolic blood pressure DBP1 and the previous systolic blood pressure SBP0 and diastolic blood pressure DBP0, the blood pressure abnormality index BAC is calculated based on the formula: ; Where T is the time interval; PCR min The lower limit of normal blood pressure change rate; PCR max is the upper limit of normal blood pressure change rate; AY is the age of the person to be tested;

[0023] According to blood pressure abnormality index 1 - PCR and blood pressure abnormality index 2 - BAC, calculate the blood pressure abnormality reference value PBH, and the formula is as follows: 。

[0024] In the preferred scheme of the above - mentioned cardiovascular detection method: The method for calculating the pulse wave velocity PWV is:

[0025] The pulse wave signal data includes the arterial cross - sectional area AM, the arterial volume change VK, and the arterial length LH;

[0026] According to the pulse wave signal data, the current systolic blood pressure SBP1, and the diastolic blood pressure DBP1, calculate the pulse wave velocity PWV, and the calculation formula is: ; where d is the arterial diameter.

[0027] In the preferred scheme of the above - mentioned cardiovascular detection method: The method for calculating the cardiovascular comprehensive index SQI is:

[0028] According to the heart rate evaluation value HR, the heart rhythm index RI, the blood pressure abnormality reference value PBH, and the pulse wave velocity PWV, calculate the cardiovascular comprehensive index SQI, and the calculation formula is: ; where ω1 is the weight coefficient of the heart rate evaluation value HR, and its value ranges from 0.2 to 0.4; ω2 is the weight coefficient of the heart rhythm index RI, and its value ranges from 0.1 to 0.3; ω3 is the weight coefficient of the blood pressure abnormality reference value PBH, and its value ranges from 0.3 to 0.5; ω4 is the weight coefficient of the pulse wave velocity PWV, and its value ranges from 0.2 to 0.4; and ω1 + ω2 + ω3 + ω4 = 1.

[0029] In the preferred scheme of the above - mentioned cardiovascular detection method: The method for judging whether the cardiovascular system is in a risk state is:

[0030] The set of cardiovascular comprehensive index thresholds includes cardiovascular comprehensive index threshold 1 - SQI1, cardiovascular comprehensive index threshold 2 - SQI2, and cardiovascular comprehensive index threshold 3 - SQI3, and SQI1 < SQI2 < SQI3;

[0031] When SQI ≤ SQI1, it is judged that the cardiovascular system is in a high - risk state, and a first - level alarm is issued;

[0032] When SQI1 < SQI ≤ SQI2, it is judged that the cardiovascular system is in a medium - risk state, and a second - level alarm is issued;

[0033] When SQI2 < SQI ≤ SQI3, it is judged that the cardiovascular system is in a low - risk state, and a third - level alarm is issued

[0034] When SQI > SQI3, it is judged that the cardiovascular system is in a normal state, and no alarm is issued.

[0035] In a preferred embodiment of the above-mentioned cardiovascular detection method: The method for calculating the cardiovascular reserve index CRI is as follows:

[0036] The electrocardiogram signal data further includes the resting heart rate HG.

[0037] Based on the cardiovascular comprehensive index SQI and the resting heart rate HG, calculate the cardiovascular reserve index CRI. The calculation formula is: ; where GI is the gender coefficient; LDL is low-density lipoprotein cholesterol; HDL is high-density lipoprotein cholesterol.

[0038] In a preferred embodiment of the above-mentioned cardiovascular detection method: The method for judging the health level of the cardiovascular system is as follows:

[0039] Based on the cardiovascular reserve index CRI, calculate the cardiovascular health index CHR. The calculation formula is: ; where BIM is the body mass index; SC is the smoking coefficient; EFP is the weekly exercise frequency;

[0040] The cardiovascular health index thresholds include the first cardiovascular health index threshold CHR1 and the second cardiovascular health index threshold CHR2, and CHR1 < CHR2;

[0041] When CHR ≤ CHR1, judge that the health level of the cardiovascular system is low;

[0042] When CHR1 < CHR ≤ CHR2, judge that the health level of the cardiovascular system is medium;

[0043] When CHR > CHR2, judge that the health level of the cardiovascular system is high.

[0044] The present invention also discloses a cardiovascular detection system for implementing the above-mentioned cardiovascular detection method, including:

[0045] A data acquisition module for acquiring electrocardiogram signal data, blood pressure signal data, and pulse wave signal data of the person to be detected;

[0046] A data processing module for calculating the heart rate evaluation value HR based on the electrocardiogram signal data; calculating the heart rhythm index RI according to the heart rate evaluation value HR and the electrocardiogram signal data; calculating the first blood pressure abnormality index PCR and the second blood pressure abnormality index BAC based on the blood pressure signal data, and calculating the blood pressure abnormality reference value PBH according to the first blood pressure abnormality index PCR and the second blood pressure abnormality index BAC; calculating the pulse wave velocity PWV according to the blood pressure signal data and the pulse wave signal data;

[0047] The risk judgment module is used to calculate the cardiovascular comprehensive index SQI according to the heart rate evaluation value HR, the heart rhythm index RI, the blood pressure abnormality reference value PBH and the pulse wave velocity PWV; preset the cardiovascular comprehensive index threshold set, compare the cardiovascular comprehensive index SQI with the cardiovascular comprehensive index threshold set, and judge whether the cardiovascular system is in a risk state according to the comparison result; if the cardiovascular system is in a risk state, an alarm is issued;

[0048] The cardiovascular assessment module calculates the cardiovascular reserve index CRI based on the ECG signal data and the comprehensive cardiovascular index SQI if the cardiovascular system is in a normal state; calculates the cardiovascular health index CHR based on the cardiovascular reserve index CRI; presets the cardiovascular health index threshold, compares the cardiovascular health index CHR with the cardiovascular health index threshold, and determines the cardiovascular health level based on the comparison result.

[0049] (III) Beneficial effects

[0050] The present invention provides a cardiovascular detection method and system, which have the following beneficial effects:

[0051] (1) ECG signal data can reflect the activity of the heart and accurately obtain key information such as heart rate. Blood pressure signal data is crucial for understanding the stress state of the cardiovascular system. Its changes can reflect the heart's pumping function and the resistance of blood vessels. Pulse wave signal data can reflect the propagation of heart beats in blood vessels.

[0052] (2) Calculating heart rate assessment values ​​and heart rhythm indicators can provide a deeper understanding of the stability and complexity of heart rhythm, which is critical for early detection of heart problems such as arrhythmias. Calculating abnormal blood pressure reference values ​​can effectively monitor blood pressure fluctuations and promptly detect potential hypertension risks. Calculating pulse wave velocity helps assess the elasticity and hardening of blood vessels, which is of great significance for preventing cardiovascular diseases such as atherosclerosis.

[0053] (3) The calculation of comprehensive cardiovascular indicators combines multiple key indicators to more comprehensively and accurately reflect the overall state of the cardiovascular system and avoid the limitations of single indicator evaluation. A set of thresholds for comprehensive cardiovascular indicators is preset to determine whether the cardiovascular system is at risk. This evaluation method can timely and accurately detect potential risks in the cardiovascular system. This plays a vital role in preventing acute attacks of cardiovascular diseases and can reduce the morbidity and mortality of cardiovascular diseases.

[0054] (4) Calculate the cardiovascular reserve index and, based on it, calculate the cardiovascular health index. By comparing it with the preset threshold, the cardiovascular health level can be determined. This process can provide a more detailed graded assessment of cardiovascular health, not only to determine whether there is a disease, but also to understand the functional reserve of the cardiovascular system. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 The figure is a schematic diagram of the steps of a cardiovascular detection method of the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] See also Figure 1 The present invention provides a cardiovascular detection method, comprising:

[0058] Step 1: Collect the ECG signal data, blood pressure signal data and pulse wave signal data of the person to be tested.

[0059] Comprehensive step one:

[0060] Collecting multiple data of the person to be tested can give a comprehensive understanding of the state of the cardiovascular system. These data serve as the basis for cardiovascular health assessment and can provide raw materials for subsequent accurate analysis of cardiovascular function, avoiding one-sided assessments caused by single data.

[0061] Step 2: Calculate the heart rate assessment value HR based on the ECG signal data; calculate the heart rhythm index RI based on the heart rate assessment value HR and the ECG signal data; calculate the abnormal blood pressure index PCR and the abnormal blood pressure index BAC based on the blood pressure signal data, and calculate the abnormal blood pressure reference value PBH based on the abnormal blood pressure index PCR and the abnormal blood pressure index BAC; calculate the pulse wave conduction velocity PWV based on the blood pressure signal data and the pulse wave signal data.

[0062] Step 201: Calculate the heart rate evaluation value HR, the specific method is:

[0063] ECG signal data includes cardiac cycle duration t under different detection conditions k，i and the average cardiac cycle duration ta k .

[0064] It should be noted that on an electrocardiogram, a cardiac cycle usually starts from the starting point of one p wave and ends at the starting point of the next p wave. By using an electrocardiograph to collect electrocardiogram signals of the subject in different states such as resting state, exercise state and sleeping state, the waveforms in different states are observed on electrocardiogram recording paper or on the display screen of the electrocardiograph, and the time interval between the starting points of each two adjacent p waves is measured. The time interval is the cardiac cycle length t k，i . Get the duration of multiple cardiac cycles t k，i Then, the duration of cardiac cycles in multiple different states is summed and divided by the number of detected cardiac cycles to obtain the average cardiac cycle duration ta k .

[0065] According to the cardiac cycle duration t k，i and the average cardiac cycle duration ta k , calculate the heart rate assessment value HR, the calculation formula is: ; where t k，i is the duration of the i-th cardiac cycle in the k-th detection state, k is the serial number of different detection states, and its value is [1, 3], which can correspond to the resting state, the moving state and the sleeping state respectively, i is the serial number of the cardiac cycle, and its value is [1, n]; n is the number of the detected cardiac cycles, and its value is a positive integer; ta k is the average cardiac cycle duration in the kth detection state.

[0066] It should be noted that The denominator of this part represents the average standard deviation of the heart beat cycle in the three detection states, which is used to measure the discreteness of the data. One minute is converted into 60 seconds and divided by the denominator to get the average heart rate, which is used to understand the average heart beat cycle and cycle fluctuations, thereby evaluating the health and function of the heart. This part is to put the formula Normalization is performed. The fluctuation of cardiac cycle duration in different detection states and the number of detected cardiac cycles are comprehensively considered to evaluate the heart rate.

[0067] Step 202: Calculate the heart rhythm index RI, the specific method is:

[0068] ECG signal data also includes interval value RR j and the interval average RRA.

[0069] It should be noted that in the electrocardiogram, the R wave represents ventricular depolarization. The time interval between two adjacent R wave vertices is the RR interval value. The RR interval value reflects the time between two ventricular excitations of the heart, and its length is inversely proportional to the heart rate. By using an electrocardiograph to collect the electrocardiogram signal of the subject to be tested, the position of the R wave is directly observed on the electrocardiogram recording paper. The interval value RR is obtainedj After that, the interval value RR j The sum is then divided by the number of RR interval values ​​to obtain the interval average RRA.

[0070] According to the heart rate evaluation value HR, the average cardiac cycle duration ta k , interval value RR j The heart rhythm index RI is calculated based on the average value of the interval RRA, and the formula is: ; Among them, RR j is the jth interval value, j is the sequence number of the interval value, and its value is [1, m]; m is the total number of interval values, and its value is a positive integer.

[0071] It should be noted that the interval value The standard deviation of the heart rhythm is multiplied by HR, which comprehensively considers the impact of the basic frequency of the heart rhythm and its fluctuation on the heart rhythm index; divided by the average cardiac cycle length, a coefficient related to the degree of irregularity of the heart rhythm is obtained, and multiplied by This part further considers the impact of the discrete degree of interval values ​​on the heart rhythm index. This formula calculates the heart rhythm index by comprehensively considering the discrete degree of interval values, the average cardiac cycle length and the heart rate evaluation value, thereby reflecting the regularity of the heart rhythm.

[0072] Step 203: Calculate the abnormal blood pressure reference value PBH. The specific method is as follows:

[0073] Blood pressure signal data includes the systolic blood pressure value SBP of the historical detection cycle d , diastolic blood pressure value DBP d , the actual measured values ​​of different biochemical indicators BO a As well as the current systolic pressure SBP1, diastolic pressure DBP1, and the previous systolic pressure SBP0 and diastolic pressure DBP0.

[0074] It should be noted that the systolic blood pressure value SBP of the historical test period can be obtained by searching the historical blood pressure test records of the patient in the electronic medical record system of the medical institution. d and diastolic blood pressure DBP d For example, by collecting blood samples, performing corresponding biochemical analysis based on blood sugar, blood lipids, renal function and liver function test items, the actual measurement values ​​of different biochemical indicators BO are obtained. a， For example, actual blood sugar values ​​and actual cholesterol values.

[0075] By using an electronic sphygmomanometer, the blood pressure of the person to be tested is directly measured to obtain the current systolic pressure SBP1 and diastolic pressure DBP1. According to the history recording function of the electronic sphygmomanometer, the systolic pressure SBP0 and diastolic pressure DBP0 of the previous moment are obtained.

[0076] According to the heart rate assessment value HR, systolic blood pressure value SBP d , diastolic blood pressure value DBP d and the actual measured value BO a , calculate the abnormal blood pressure index - PCR, the calculation formula is: Among them, SBP d DBP is the systolic blood pressure value obtained during the dth routine blood pressure measurement, where d is the routine blood pressure measurement number and takes the value [1, M]; d is the diastolic blood pressure value obtained during the dth routine blood pressure measurement, BO a is the actual measured value of the a-th biochemical index, a is the serial number of the biochemical index, and its value is [1, ri]; BO a，ref is the normal reference value corresponding to the a-th biochemical index; W1 is Weight coefficient, the value is 0.2~0.4; W2 is The weight coefficient is 0.3~0.5; W3 is The weight coefficient is between 0.1 and 0.5.

[0077] It should be noted that the normal reference value BO corresponding to the a-th biochemical index is obtained. a，ref By accessing professional medical databases such as PubMed and Web of Science, we can find the normal reference value BO of the a-th biochemical index recorded in them. a，ref .

[0078] It should be noted that , and Respectively represent the deviation ratio of systolic blood pressure, diastolic blood pressure and heart rate assessment value from their respective reference values. The weight coefficient is used to adjust the importance of systolic blood pressure, diastolic blood pressure, heart rate assessment value and biochemical indicators in the calculation. It represents the sum of the deviation ratios between the actual measured values ​​of all biochemical indicators and the normal reference values. The denominator adjusts the value range of the calculation result by the number of measurements and the weight coefficient. By dividing the numerator by the denominator, the abnormal blood pressure index - PCR is obtained.

[0079] According to the current systolic blood pressure SBP1, diastolic blood pressure DBP1 and the previous systolic blood pressure SBP0 and diastolic blood pressure DBP0, the blood pressure abnormality index BAC is calculated based on the following formula: ; Where T is the time interval; PCR min The lower limit of normal blood pressure change rate; PCR max is the upper limit of normal blood pressure change rate; AY is the age of the person to be tested.

[0080] It should be noted that to obtain the time interval T, check the measurement record of the electronic blood pressure monitor. The blood pressure monitor will display the time of each measurement. The time interval T can be obtained by subtracting the time of the last blood pressure measurement from the current time.

[0081] Obtain the lower limit of normal blood pressure change rate PCR min and the upper limit of normal blood pressure change rate PCR max By referring to medical literature such as the "Guidelines for the Prevention and Treatment of Hypertension in China" and the "Journal of the American College of Cardiology", we can find the normal range of blood pressure change rate for different age groups, different genders and other different situations, and obtain the lower limit of normal blood pressure change rate PCR min and the upper limit of normal blood pressure change rate PCR max .

[0082] The age AY of the person to be detected is obtained by obtaining the identity information of the person to be detected.

[0083] It should be noted that SBP1-SBP0 reflects the change in systolic blood pressure between the current moment and the previous moment. Divided by SBP0×T, the relative change rate of systolic blood pressure per unit time is obtained; DBP1-DBP0 reflects the change in diastolic blood pressure between the current moment and the previous moment, divided by DBP0×T, the relative change rate of diastolic blood pressure per unit time is obtained, and the blood pressure change rate is obtained by adding them together. The blood pressure change rate is subtracted from the lower limit of the normal blood pressure change rate PCR. min， It reflects the deviation of the current blood pressure change rate from the lower limit of normal. max -PCR min It represents the range of normal blood pressure change rate. The numerator of this part divided by the denominator expresses the proportion of the deviation of the blood pressure change rate. The larger the proportion, the more serious the abnormal situation. This item is used to adjust the calculation results of the abnormal blood pressure index so that the effect of age on blood pressure can be reflected. This formula takes into account the blood pressure change rate and age factors and is used to evaluate whether the blood pressure of the person being tested is normal.

[0084] According to the abnormal blood pressure index PCR and the abnormal blood pressure index BAC, the abnormal blood pressure reference value PBH is calculated according to the following formula: .

[0085] Step 204: Calculate the pulse wave velocity PWV, the specific method is:

[0086] The pulse wave signal data includes arterial cross-sectional area AM, arterial volume change VK, and arterial length LH.

[0087] It should be noted that the arterial cross-sectional area AM can be obtained by intravascular ultrasound IVUS, optical coherence tomography OCT, etc., or by placing an ultrasound probe on the skin of the person to be tested to obtain a cross-sectional image of the vascular artery, thereby obtaining the inner diameter of the vascular artery as y, and then calculating the arterial cross-sectional area AM, AM=π×(y / 2) 2 .

[0088] By placing an ultrasonic probe on the skin of the person to be tested, the arterial radius rs during the systolic period and the arterial radius rd during the diastolic period are obtained, and the arterial volume change VK is calculated using the following formula: .

[0089] An ultrasonic probe is used to scan along the direction of the artery and continuous measurements are made from the starting point to the end point of the artery to determine the starting and ending positions of the artery and obtain the artery length LH.

[0090] According to the pulse wave signal data, the current systolic pressure SBP1 and diastolic pressure DBP1, the pulse wave velocity PWV is calculated using the following formula: ; where d is the diameter of the artery.

[0091] It should be noted that the artery diameter d is obtained by placing an ultrasonic probe on the skin of the person to be tested and obtaining a cross-sectional image of the blood vessel, thereby obtaining the inner diameter of the blood vessel artery y and the arterial wall thickness W, and then calculating the artery diameter d, d=y+2×W.

[0092] It should be noted that It represents the product of the pressure difference and the force-bearing area on the arterial wall during one cardiac cycle, which reflects to a certain extent the amount of stress on the arterial wall. This part takes into account the effect of age on arterial elasticity. As age increases, arterial elasticity decreases, and dividing by VK reflects the elasticity index of the artery during a cardiac cycle. is the volume of the artery, which takes into account the effect of the geometric characteristics of the artery on the pulse wave velocity. The elasticity index is divided by the volume of the artery and then the square root is taken to obtain the pulse wave velocity. This formula calculates the pulse wave velocity by comprehensively considering the parameters related to the elasticity and geometric characteristics of the artery, thereby evaluating the stiffness of the artery.

[0093] Comprehensive steps 201 to 204:

[0094] Calculating heart rate assessment values ​​and heart rhythm indicators can provide a deeper understanding of the stability and complexity of heart rhythm, which is critical for early detection of heart problems such as arrhythmias. Calculating abnormal blood pressure reference values ​​can effectively monitor blood pressure fluctuations and promptly detect potential hypertension risks. Calculating pulse wave velocity helps assess the elasticity and hardening of blood vessels, which is important for preventing cardiovascular diseases such as atherosclerosis.

[0095] Step 3: Calculate the comprehensive cardiovascular index SQI based on the heart rate assessment value HR, heart rhythm index RI, abnormal blood pressure reference value PBH and pulse wave velocity PWV; preset a set of comprehensive cardiovascular index thresholds, compare the comprehensive cardiovascular index SQI with the set of comprehensive cardiovascular index thresholds, and determine whether the cardiovascular system is in a risky state based on the comparison results; if the cardiovascular system is in a risky state, issue an alarm.

[0096] Step 301: Calculate the cardiovascular comprehensive index SQI, the specific method is:

[0097] The cardiovascular comprehensive index SQI is calculated based on the heart rate assessment value HR, heart rhythm index RI, blood pressure abnormality reference value PBH and pulse wave velocity PWV. The calculation formula is: ; Among them, ω1 is the weight coefficient of the heart rate assessment value HR, which is 0.2~0.4; ω2 is the weight coefficient of the heart rhythm index RI, which is 0.1~0.3; ω3 is the weight coefficient of the abnormal blood pressure reference value PBH, which is 0.3~0.5; ω4 is the weight coefficient of the pulse wave velocity PWV, which is 0.2~0.4; and ω1+ω2+ω3+ω4=1.

[0098] It should be noted that this formula comprehensively considers four important parameters: heart rate assessment value HR, heart rhythm index RI, blood pressure abnormality reference value PBH and pulse wave velocity PWV. Each parameter has a corresponding weight coefficient, which indicates the importance of different parameters when calculating the cardiovascular comprehensive index SQI. By multiplying each parameter with its corresponding weight coefficient and then summing them, a cardiovascular comprehensive index SQI that can fully describe the cardiovascular system is obtained.

[0099] Step 302: Determine whether the cardiovascular system is in a risk state. The specific method is:

[0100] Preset set of cardiovascular comprehensive index thresholds; The set of cardiovascular comprehensive index thresholds includes the first cardiovascular comprehensive index threshold SQI1, the second cardiovascular comprehensive index threshold SQI2, and the third cardiovascular comprehensive index threshold SQI3, and SQI1 < SQI2 < SQI3; By observing a large number of normal people without a history of cardiovascular disease, data such as their heart beat frequency, heart rhythm index, blood pressure abnormality index, and pulse wave velocity are collected. Analyze these data and calculate the cardiovascular comprehensive index SQI for each person. According to the cardiovascular comprehensive index SQI of all people, calculate the average value of the cardiovascular comprehensive index SQIavg and the standard deviation θ; Take SQIavg - θ as the first cardiovascular comprehensive index threshold SQI1; Take SQIavg as the second cardiovascular comprehensive index threshold SQI2; Take SQIavg + θ as the third cardiovascular comprehensive index threshold SQI3.

[0101] When SQI ≤ SQI1, it is judged that the cardiovascular is in a high-risk state and a first-level alarm is issued; The first-level alarm is that the red indicator light of the monitoring device is continuously on or flashing rapidly;

[0102] When SQI1 < SQI ≤ SQI2, it is judged that the cardiovascular is in a medium-risk state and a second-level alarm is issued; The second-level alarm is that the yellow indicator light of the monitoring device flashes at a medium frequency;

[0103] When SQI2 < SQI ≤ SQI3, it is judged that the cardiovascular is in a low-risk state and a third-level alarm is issued; The third-level alarm is that the green indicator light of the monitoring device flashes slowly;

[0104] When SQI > SQI3, it is judged that the cardiovascular is in a normal state and no alarm is issued.

[0105] Combined steps 301 to 302:

[0106] By calculating the cardiovascular comprehensive index and comparing it with the threshold, the risk status of the cardiovascular system is judged, realizing a rapid assessment of the overall health status of the cardiovascular system. Once it is found that the cardiovascular is in a risk state, an alarm can be issued in time, which can prompt the patient to seek medical treatment as soon as possible, avoid the deterioration of the condition, and ensure the life and health of the patient.

[0107] Step four: If the cardiovascular is in a normal state, calculate the cardiovascular reserve index CRI according to the electrocardiogram signal data and the cardiovascular comprehensive index SQI; Calculate the cardiovascular health index CHR based on the cardiovascular reserve index CRI; Preset the cardiovascular health index threshold, compare the cardiovascular health index CHR with the cardiovascular health index threshold, and judge the health level of the cardiovascular according to the comparison result.

[0108] Step 401: Calculate the cardiovascular reserve index CRI, and the specific method is:

[0109] The ECG signal data also includes the resting heart rate HG.

[0110] It should be noted that the resting heart rate refers to the number of heart beats per minute in a quiet state. By using an electrocardiogram, the electrocardiogram signal of the person to be tested is measured. On the recorded electrocardiogram, multiple consecutive QRS complexes are found. The time interval between the starting points of two adjacent QRS complexes is measured in seconds. The resting heart rate HG is obtained by dividing the measured time interval by 60.

[0111] According to the comprehensive cardiovascular index SQI and resting heart rate HG, the cardiovascular reserve index CRI is calculated using the following formula: ; Among them, GI is the gender coefficient.

[0112] It should be noted that to obtain the gender coefficient GI, a number of male and female samples are obtained, and the average cardiovascular comprehensive index of males and females under the same age and resting heart rate conditions are calculated respectively, and the average cardiovascular comprehensive index SQIm for males and SQIf for females are obtained; if the difference is measured based on the average cardiovascular comprehensive index of males, and the gender coefficient GI of males is set to 1, then the gender coefficient GI of females is [1+ (SQIf-SQIm)] / SQIm. For example, if the average cardiovascular comprehensive index of males SQIm=80 and the average cardiovascular comprehensive index of females SQIf=70, then the gender coefficient GI of females is 1+ (70-80) / 80=0.875. The value of the gender coefficient GI is different depending on the gender of the person to be tested.

[0113] It should be noted that low-density lipoprotein cholesterol (LDL) and high-density lipoprotein cholesterol (HDL) are obtained by drawing venous blood samples from patients and testing the blood samples using a biochemical analyzer.

[0114] It should be noted that SQI reflects the overall condition of the cardiovascular system, while GI takes into account the impact of gender on cardiovascular function. Reflects the impact of age on cardiovascular function. The cardiovascular effects of low-density lipoprotein cholesterol are taken into account; the higher the LDL, the larger the value of this component, and the greater the impact on the cardiovascular reserve index. The effect of high-density lipoprotein cholesterol on the cardiovascular system is taken into account; the higher the HDL, the larger the value of this part, and the greater the impact on the cardiovascular reserve index. In general, this formula takes these parameters into account to derive the cardiovascular reserve index. This index can be used to assess cardiovascular reserve function, and the higher the value, the stronger the cardiovascular reserve capacity.

[0115] Step 402: Determine the cardiovascular health level, the specific method is:

[0116] Based on the cardiovascular reserve index CRI, calculate the cardiovascular health index CHR. The calculation formula is as follows: ; where BIM is the body mass index; SC is the smoking coefficient; EFP is the weekly exercise frequency.

[0117] It should be noted that to obtain the body mass index BIM, the weight kg and height ml of the person to be tested are obtained, and then the body mass index BIM is calculated as BIM = kg / ml 2 .

[0118] To obtain the smoking coefficient SC, by collecting the number of cigarettes NF smoked per day and the number of years of smoking YF of the smoker, the smoking coefficient SC is calculated as SC = 0.01×NF×YF. If the person to be tested does not smoke, the value of SC is taken as 1.

[0119] To obtain the weekly exercise frequency EFP, by wearing devices such as smart bracelets and smart watches to monitor the exercise status of the patient; after a week, check the exercise data report, and the weekly exercise frequency will be automatically counted in the report to obtain the weekly exercise frequency EFP.

[0120] It should be noted that 1 / CRI indicates that the smaller the CRI, the better the cardiovascular health status, and the larger its reciprocal, the greater the contribution to the cardiovascular health index. (1 + 0.2×BIM) indicates that the higher the BMI, the larger the value of this item. Adding 1 is to ensure that this item is always positive. This item reflects the impact of weight on cardiovascular health. The higher the BMI, the greater the possible negative impact on cardiovascular health. If the person is a smoker, the value of SC will be larger, which will increase the value of CHR, reflecting the adverse effect of smoking on cardiovascular health. It indicates that the higher the exercise frequency, the better the cardiovascular health status. 0.5×AY indicates that the older the age, the larger the value of this item, and the greater the negative impact on the cardiovascular health index. This formula evaluates the cardiovascular health index by comprehensively considering factors such as cardiovascular reserve capacity, weight, smoking status, exercise frequency, and age. These factors interact with each other and jointly affect the health status of the cardiovascular system.

[0121] Preset the cardiovascular health index threshold; the cardiovascular health index threshold includes the cardiovascular health index threshold one CHR1 and the cardiovascular health index threshold two CHR2, and CHR1 < CHR2; by examining and monitoring a large number of normal people without a history of cardiovascular disease, collecting data such as their cardiovascular reserve index, body mass index, and smoking coefficient; analyzing these data and calculating the cardiovascular health index CHR of each person. Based on multiple cardiovascular health indices CHR, calculate the average value CHRavg and the standard deviation σ of the cardiovascular health index, take CHRavg - σ as the cardiovascular health index threshold one CHR1, and take CHRavg + σ as the cardiovascular health index threshold two CHR2.

[0122] When CHR ≤ CHR1, it is determined that the cardiovascular health level is low;

[0123] When CHR1 < CHR ≤ CHR2, it is determined that the cardiovascular health level is medium;

[0124] When CHR > CHR2, it is determined that the cardiovascular health level is high.

[0125] Combined steps 401 to 402:

[0126] Calculate the cardiovascular reserve index and the cardiovascular health index, and determine the cardiovascular health level by comparing with the threshold values. This helps to understand the potential reserve capacity of the cardiovascular system and take preventive measures against cardiovascular diseases in advance.

[0127] On the other hand, the present invention also discloses a cardiovascular detection system for implementing the above-mentioned cardiovascular detection method, including:

[0128] A data acquisition module for acquiring electrocardiogram signal data, blood pressure signal data, and pulse wave signal data of the person to be detected;

[0129] A data processing module for calculating the heart rate assessment value HR based on the electrocardiogram signal data; calculating the heart rhythm index RI according to the heart rate assessment value HR and the electrocardiogram signal data; calculating the blood pressure abnormality index I PCR and the blood pressure abnormality index II BAC respectively based on the blood pressure signal data, and calculating the blood pressure abnormality reference value PBH according to the blood pressure abnormality index I PCR and the blood pressure abnormality index II BAC; calculating the pulse wave velocity PWV according to the blood pressure signal data and the pulse wave signal data;

[0130] A risk judgment module for calculating the cardiovascular comprehensive index SQI according to the heart rate assessment value HR, the heart rhythm index RI, the blood pressure abnormality reference value PBH, and the pulse wave velocity PWV; presetting a set of cardiovascular comprehensive index threshold values, comparing the cardiovascular comprehensive index SQI with the set of cardiovascular comprehensive index threshold values, and determining whether the cardiovascular system is in a risk state according to the comparison result; if the cardiovascular system is in a risk state, an alarm is issued;

[0131] A cardiovascular assessment module, if the cardiovascular system is in a normal state, calculates the cardiovascular reserve index CRI according to the electrocardiogram signal data and the cardiovascular comprehensive index SQI; calculates the cardiovascular health index CHR based on the cardiovascular reserve index CRI; presets a cardiovascular health index threshold value, compares the cardiovascular health index CHR with the cardiovascular health index threshold value, and determines the cardiovascular health level according to the comparison result.

[0132] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. A person of ordinary skill in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented in electronic hardware or in combination with computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0133] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0134] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A cardiovascular testing method, characterized in that: Including: Collecting electrocardiogram signal data, blood pressure signal data, and pulse wave signal data of the person to be detected; Calculating the heart rate evaluation value HR based on the electrocardiogram signal data; Calculating the heart rhythm index RI according to the heart rate evaluation value HR and the electrocardiogram signal data; calculating the blood pressure abnormality index one PCR and the blood pressure abnormality index two BAC respectively based on the blood pressure signal data, and calculating the blood pressure abnormality reference value PBH according to the blood pressure abnormality index one PCR and the blood pressure abnormality index two BAC; calculating the pulse wave velocity PWV according to the blood pressure signal data and the pulse wave signal data; Calculating the comprehensive cardiovascular index SQI according to the heart rate evaluation value HR, the heart rhythm index RI, the blood pressure abnormality reference value PBH, and the pulse wave velocity PWV; Presetting a set of comprehensive cardiovascular index thresholds, comparing the comprehensive cardiovascular index SQI with the set of comprehensive cardiovascular index thresholds, and judging whether the cardiovascular system is in a risk state according to the comparison result; if the cardiovascular system is in a risk state, issuing an alarm; If the cardiovascular system is in a normal state, calculating the cardiovascular reserve index CRI according to the electrocardiogram signal data and the comprehensive cardiovascular index SQI; calculating the cardiovascular health index CHR based on the cardiovascular reserve index CRI; presetting a cardiovascular health index threshold, comparing the cardiovascular health index CHR with the cardiovascular health index threshold, and judging the health level of the cardiovascular system according to the comparison result.

2. A cardiovascular detection method according to claim 1, characterized in that: The method for calculating the heart rate evaluation value HR is: ECG signal data includes cardiac cycle duration t under different detection conditions k，i and the average cardiac cycle duration ta k ; According to the cardiac cycle duration t k，i and the average cardiac cycle duration ta k , calculate the heart rate assessment value HR, the calculation formula is: ; where t k，i is the duration of the i-th cardiac cycle in the k-th detection state, k is the serial number of different detection states, and its value is [1, 3], i is the serial number of the cardiac cycle, and its value is [1, n]; n is the number of detected cardiac cycles, and its value is a positive integer; ta k is the average cardiac cycle duration in the kth detection state.

3. A cardiovascular detection method according to claim 2, characterized in that: The method for calculating the heart rhythm index RI is: ECG signal data also includes interval value RR j and the interval average RRA; According to the heart rate evaluation value HR, the average cardiac cycle duration ta k , interval value RR j The heart rhythm index RI is calculated based on the average value of the interval RRA, and the formula is: ; Among them, RR j is the jth interval value, j is the sequence number of the interval value, and its value is [1, m]; m is the total number of interval values, and its value is a positive integer.

4. A cardiovascular detection method according to claim 3, characterized in that: The method for calculating the blood pressure abnormality reference value PBH is: Blood pressure signal data includes the systolic blood pressure value SBP of the historical detection cycle d , diastolic blood pressure value DBP d , the actual measured values ​​of different biochemical indicators BO a And the current systolic blood pressure SBP1, diastolic blood pressure DBP1, the previous systolic blood pressure SBP0 and diastolic blood pressure DBP0; According to the heart rate assessment value HR, systolic blood pressure value SBP d , diastolic blood pressure value DBP d and the actual measured value BO a , calculate the abnormal blood pressure index - PCR, the calculation formula is: Among them, SBP d DBP is the systolic blood pressure value obtained during the dth routine blood pressure measurement, where d is the routine blood pressure measurement number and takes the value [1, M], and M is the total number of routine blood pressure measurements; d is the diastolic blood pressure value obtained during the dth routine blood pressure measurement, BO a is the actual measured value of the a-th biochemical indicator, a is the serial number of the biochemical indicator, and its value is [1, ri], ri is the total number of biochemical indicator types; BO a，ref is the normal reference value corresponding to the a-th biochemical index; W1 is Weight coefficient, the value is 0.2~0.4; W2 is The weight coefficient is 0.3~0.5; W3 is The weight coefficient is between 0.1 and 0.5; According to the current systolic blood pressure SBP1, diastolic blood pressure DBP1, the previous systolic blood pressure SBP0, and diastolic blood pressure DBP0; calculating the blood pressure abnormality index two BAC, and the formula used is: ; Where T is the time interval; PCR min The lower limit of normal blood pressure change rate; PCR max is the upper limit of normal blood pressure change rate; AY is the age of the person to be tested; According to the abnormal blood pressure index PCR and the abnormal blood pressure index BAC, the abnormal blood pressure reference value PBH is calculated according to the following formula: .

5. A cardiovascular detection method according to claim 4, characterized in that: The method for calculating the pulse wave velocity PWV is: The pulse wave signal data includes the arterial cross-sectional area AM, the arterial volume change VK, and the arterial length LH; According to the pulse wave signal data, the current systolic pressure SBP1 and diastolic pressure DBP1, the pulse wave velocity PWV is calculated using the following formula: ; where d is the diameter of the artery.

6. A cardiovascular detection method according to claim 5, characterized in that: The method for calculating the comprehensive cardiovascular index SQI is: The cardiovascular comprehensive index SQI is calculated based on the heart rate assessment value HR, heart rhythm index RI, blood pressure abnormality reference value PBH and pulse wave velocity PWV. The calculation formula is: ; Among them, ω1 is the weight coefficient of the heart rate assessment value HR, which is 0.2~0.4; ω2 is the weight coefficient of the heart rhythm index RI, which is 0.1~0.3; ω3 is the weight coefficient of the abnormal blood pressure reference value PBH, which is 0.3~0.5; ω4 is the weight coefficient of the pulse wave velocity PWV, which is 0.2~0.4; and ω1+ω2+ω3+ω4=1.

7. A cardiovascular detection method according to claim 6, characterized in that: The method for judging whether the cardiovascular system is in a risk state is: The set of comprehensive cardiovascular index thresholds includes the comprehensive cardiovascular index threshold one SQI1, the comprehensive cardiovascular index threshold two SQI2, and the comprehensive cardiovascular index threshold three SQI3, and SQI1 < SQI2 < SQI3; When SQI ≤ SQI1, it is judged that the cardiovascular system is in a high-risk state, and a first-level alarm is issued; When SQI1 < SQI ≤ SQI2, it is judged that the cardiovascular system is in a medium-risk state, and a second-level alarm is issued; When SQI2 < SQI ≤ SQI3, it is judged that the cardiovascular system is in a low-risk state, and a third-level alarm is issued When SQI > SQI3, it is judged that the cardiovascular system is in a normal state, and no alarm is issued.

8. A cardiovascular detection method according to claim 7, characterized in that: The method for calculating the cardiovascular reserve index CRI is: The electrocardiogram signal data also includes the resting heart rate HG; According to the comprehensive cardiovascular index SQI and resting heart rate HG, the cardiovascular reserve index CRI is calculated using the following formula: ; Among them, GI is the gender coefficient; LDL is low-density lipoprotein cholesterol; HDL is high-density lipoprotein cholesterol.

9. A cardiovascular detection method according to claim 8, characterized in that: The method for judging the health level of the cardiovascular system is: Based on the cardiovascular reserve index CRI, the cardiovascular health index CHR is calculated using the following formula: ; Wherein, BIM is body mass index; SC is smoking coefficient; EFP is weekly exercise frequency; The cardiovascular health index threshold includes the cardiovascular health index threshold one CHR1 and the cardiovascular health index threshold two CHR2, and CHR1 < CHR2; When CHR ≤ CHR1, it is judged that the health level of the cardiovascular system is low; When CHR1 < CHR ≤ CHR2, it is judged that the health level of the cardiovascular system is medium; When CHR>CHR2, the cardiovascular health level is judged to be advanced.

10. A cardiovascular detection system, characterized in that: A data acquisition module is used to collect the electrocardiogram signal data, blood pressure signal data and pulse wave signal data of the person to be tested; The data processing module is used to calculate the heart rate evaluation value HR based on the ECG signal data; calculate the heart rhythm index RI according to the heart rate evaluation value HR and the ECG signal data; calculate the blood pressure abnormality index PCR and the blood pressure abnormality index BAC based on the blood pressure signal data, and calculate the blood pressure abnormality reference value PBH according to the blood pressure abnormality index PCR and the blood pressure abnormality index BAC; calculate the pulse wave conduction velocity PWV according to the blood pressure signal data and the pulse wave signal data; The risk judgment module is used to calculate the cardiovascular comprehensive index SQI based on the heart rate evaluation value HR, the heart rhythm index RI, the abnormal blood pressure reference value PBH and the pulse wave velocity PWV; Preset a set of comprehensive cardiovascular index thresholds, compare the comprehensive cardiovascular index SQI with the comprehensive cardiovascular index thresholds, and judge whether the cardiovascular system is in a risk state based on the comparison result; if the cardiovascular system is in a risk state, issue an alarm; The cardiovascular assessment module calculates the cardiovascular reserve index CRI based on the ECG signal data and the comprehensive cardiovascular index SQI if the cardiovascular system is in a normal state; calculates the cardiovascular health index CHR based on the cardiovascular reserve index CRI; presets the cardiovascular health index threshold, compares the cardiovascular health index CHR with the cardiovascular health index threshold, and determines the cardiovascular health level based on the comparison result.

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