Method and device for determining chest lead waveform under limb lead falling condition and medium

Abstract

The invention relates to a method and a device for determining a chest lead waveform under the condition of limb lead falling and a medium, and belongs to the technical field of medical monitoring, the method comprises the following steps: when a limb lead falls, determining a voltage value of a WCT central point based on a voltage value obtained by a non-falling limb lead; the limb lead comprises a left leg lead, a left hand lead and a right hand lead; determining a calculated value of chest lead voltage based on the voltage value obtained by the right hand lead; determining a measured value of the chest lead voltage based on the voltage value and the calculated value of the WCT central point; the measurements are used to determine chest guided waveforms. According to the method for determining the chest guide waveform under the condition that the limb lead falls off, the clear and definite chest guide waveform can still be obtained under the condition that the left leg lead or the left hand lead falls off, and the problem that the chest guide waveform is disordered or linear when the limb lead falls off is avoided.

Description

Technical Field

[0001] The present invention relates to the field of medical monitoring technology, and in particular to a method, a device and a medium for determining a chest lead waveform when a limb lead falls off. Background Art

[0002] In medical monitoring equipment, when the left leg (LL) or left arm (LA) lead of the ECG monitor currently on the market falls off, the following two situations usually occur: (1) The chest lead of the monitor will display a straight line waveform. In this case, the monitor will detect that the lead is off and give a corresponding prompt, such as displaying "Lead off" or "Please check the lead".

[0003] (2) The chest leads of the monitor will display a chaotic waveform, usually due to the lack of a correct body potential reference. In this case, the monitor may not correctly identify the lead-off and continue to try to use the damaged lead signal for ECG analysis, resulting in abnormal waveform display.

[0004] At present, it is found in the test of DM (Dim) ECG products that when the LL or LA lead falls off, the chest lead waveform drawn becomes messy, making it difficult to analyze the ECG waveform data. Summary of the invention

[0005] In view of this, it is necessary to provide a method, device and medium for determining a chest lead waveform when a limb lead is detached, so as to achieve the purpose of accurately determining the chest lead waveform when a limb lead is detached.

[0006] In order to achieve the above object, the present invention provides a method for determining a chest lead waveform when a limb lead is dropped, comprising: When a limb lead falls off, the voltage value of the WCT center point is determined based on the voltage value obtained from the limb lead that has not fallen off; the limb leads include the left leg lead, the left hand lead, and the right hand lead; Determining a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; Based on the voltage value of the WCT center point and the calculated value, a measured value of the chest lead voltage is determined; the measured value is used to determine the chest lead waveform.

[0007] In a possible implementation, determining the measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value includes: Determining a voltage difference between the leads of the limbs that have not been detached based on the voltage values ​​obtained from the leads of the limbs that have not been detached; The measured value is determined based on the voltage difference, the voltage value of the WCT center point, and the calculated value.

[0008] In a possible implementation, determining the voltage value of the WCT center point based on the voltage value obtained from the lead of the undetached limb includes: The mean value of the voltage values ​​obtained from the leads of the undetached limb is determined as the voltage value of the center point of the WCT.

[0009] In a possible implementation, the expression of the calculated value is as follows: Vx=Cx-RA Wherein, Vx represents the calculated value, x is 1-6, Cx represents the voltage value obtained by the electrode sheet, and RA represents the voltage value obtained by the right-hand lead.

[0010] In a possible implementation, when the lost limb lead is the left hand lead, the expression of the measured value is as follows: VX=Vx-II / 2 Where VX represents the measured value, Vx represents the calculated value, and II represents the voltage difference between the left leg lead and the right hand lead.

[0011] In a possible implementation, when the detached limb lead is the left leg lead, the expression of the measured value is as follows: VX=Vx-I / 2 Where VX is the measured value, Vx is the calculated value, and I is the voltage difference between the left-hand lead and the right-hand lead.

[0012] The present invention also provides a device for determining a chest lead waveform in the case where a limb lead is dropped, comprising: A first determination module is used to determine the voltage value of the WCT center point based on the voltage value obtained from the limb lead that has not fallen off when the limb lead falls off; the limb lead includes the left leg lead, the left hand lead and the right hand lead; A second determination module, used to determine a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; The third determination module is used to determine the measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value; the measured value is used to determine the chest lead waveform.

[0013] On the other hand, the present invention also provides an electronic device, including a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the method for determining the chest lead waveform when the limb lead is off as described in any of the above implementations.

[0014] On the other hand, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining a chest lead waveform in the event of limb lead detachment described in any of the above implementations.

[0015] On the other hand, the present invention also provides a computer program product, including a computer program, which, when executed by a processor, implements the method for determining a chest lead waveform in the event of limb lead detachment described in any of the above implementations.

[0016] The beneficial effects of the present invention are as follows: the method, device and medium for determining a chest lead waveform in the case of limb lead detachment provided by the present invention, when the left leg lead or the left hand lead is detached, the voltage value of the WCT center point is determined according to the voltage value obtained from the limb lead that has not been detached, the voltage value of the WCT center point can be used as a reference voltage for the chest lead, and the calculated value of the chest lead voltage is obtained according to the voltage value obtained from the right hand lead, so that the measured value of the chest lead voltage is obtained according to the voltage value and the calculated value of the WCT center point, so as to draw the chest lead waveform, that is, when the left leg lead or the left hand lead is detached, a clear and definite chest lead waveform can still be obtained, avoiding the problem of a disordered or straight-line waveform of the chest lead waveform caused by the limb lead detachment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A method flow chart of an embodiment of a method for determining a chest lead waveform in a case where a limb lead is dropped provided by the present invention; Figure 2 A flow chart of a chest conduction waveform drawing method provided by the present invention; Figure 3 This is one of the schematic diagrams of the chest conduction waveform drawn when the LA is detached provided by the present invention; Figure 4 The second schematic diagram of the chest conduction waveform drawn when the LA is detached provided by the present invention; Figure 5 A schematic structural diagram of an embodiment of a device for determining a chest lead waveform in the event of limb lead detachment provided by the present invention; Figure 6 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] In the description of the embodiments of the present invention, unless otherwise specified, "multiple" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: A exists alone, A and B exist at the same time, and B exists alone.

[0021] The descriptions of "first", "second", etc. involved in the embodiments of the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the technical features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0022] Figure 1 A method flow chart of an embodiment of a method for determining a chest lead waveform in the case of limb lead detachment provided by the present invention, as shown in FIG. Figure 1 As shown in the figure, the method for determining the chest lead waveform when the limb lead is off includes: S101, when a limb lead falls off, determining a voltage value of the WCT center point based on a voltage value obtained from a limb lead that has not fallen off; the limb leads include a left leg lead, a left hand lead, and a right hand lead; S102, determining a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; S103. Determine a measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value; the measured value is used to determine a chest lead waveform.

[0023] It should be noted that the limb leads in the embodiment of the present invention include the left leg lead, the left hand lead and the right hand lead, and the lead that is lost is the left leg lead or the left hand lead. When the lead that is lost is the left leg lead, the leads that are not lost are the left hand lead and the right hand lead; when the lead that is lost is the left hand lead, the leads that are not lost are the left leg lead and the right hand lead.

[0024] Compared with the prior art, the method for determining a chest lead waveform when a limb lead falls off provided in an embodiment of the present invention determines the voltage value of the WCT center point according to the voltage value obtained from the limb lead that has not fallen off when the left leg lead or the left hand lead falls off. The voltage value of the WCT center point can be used as a reference voltage for the chest lead, and the calculated value of the chest lead voltage is obtained according to the voltage value obtained from the right hand lead, so that the measured value of the chest lead voltage is obtained according to the voltage value and the calculated value of the WCT center point, thereby drawing the chest lead waveform. That is, when the left leg lead or the left hand lead falls off, a clear and definite chest lead waveform can still be obtained, thereby avoiding the problem of a messy or straight-line chest lead waveform appearing when the limb lead falls off.

[0025] In some embodiments of the present invention, determining the voltage value of the WCT center point based on the voltage value obtained from the lead of the undetached limb includes: The mean value of the voltage values ​​obtained from the leads of the undetached limb is determined as the voltage value of the center point of the WCT.

[0026] In some embodiments of the present invention, determining the measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value includes: Determining a voltage difference between the leads of the limbs that have not been detached based on the voltage values ​​obtained from the leads of the limbs that have not been detached; The measured value is determined based on the voltage difference, the voltage value of the WCT center point, and the calculated value.

[0027] In some embodiments of the present invention, the expression of the calculated value is as follows: Vx=Cx-RA Wherein, Vx represents the calculated value, x is 1-6, Cx represents the voltage value obtained by the electrode sheet, and RA represents the voltage value obtained by the right-hand lead.

[0028] In some embodiments of the present invention, when the lost limb lead is the left hand lead, the expression of the measured value is as follows: VX=Vx-II / 2 Where VX represents the measured value, Vx represents the calculated value, and II represents the voltage difference between the left leg lead and the right hand lead.

[0029] In some embodiments of the present invention, when the detached limb lead is the left leg lead, the expression of the measured value is as follows: VX=Vx-I / 2 Where VX is the measured value, Vx is the calculated value, and I is the voltage difference between the left-hand lead and the right-hand lead.

[0030] When LL or LA limb loss occurs: The formula for calculating Lead I is as follows: Lead I: I=LA-RA Wherein, LA represents the voltage value obtained by the left-hand lead, and RA represents the voltage value obtained by the right-hand lead.

[0031] The calculation formula for Lead II is as follows: Lead II: II=LL-RA Wherein, LL represents the voltage value obtained from the left leg lead.

[0032] If the LL or LA lead is missing, the WCT center point calculation formula is as follows: WCT=(RA+LA) / 2 or WCT=(RA+LL) / 2 The Wilson Central Terminal (WCT) center point will be used as the reference voltage for the chest leads. That is, the voltage value of the WCT center point can be obtained based on the average of the voltage values ​​obtained from the undetached limb leads.

[0033] The formula for calculating chest lead voltage is as follows: Vx=Cx-RA Among them, x represents 1-6, Cx represents C1~C6, 6 electrodes, RA is the electrode connected to the right hand, and Vx is the voltage difference between the two, which is a calculated value.

[0034] The chest lead measurement formula is as follows: VX=Cx-WCT Where VX is the voltage difference between the 6 electrodes C1~C6 and the center point (WCT), which is the measured value.

[0035] Substituting the WCT calculation formula into the chest lead measurement formula, we can get: VX=Cx-(RA+LA) / 2 or VX=Cx-(RA+LL) / 2 Substituting the chest lead voltage calculation formula into the chest lead measurement formula, we can get: VX=Vx+RA-(RA+LA) / 2 or VX=Vx+RA-(RA+LL) / 2 Since LA=RA+I, LL=RA+II, then: VX=Vx+RA-(2RA+I) / 2 or VX=Vx+RA-(2RA+II) / 2 Thus we can get: When the left leg LL lead falls off, VX=Vx-I / 2; When the left hand LA lead falls off, VX=Vx-II / 2.

[0036] VX corresponds to DATA3, DATA4, DATA5, DATA6, DATA7, DATA8.

[0037] The method for determining a chest lead waveform when a limb lead falls off provided by an embodiment of the present invention determines the voltage value of the WCT center point according to the voltage value obtained from the limb lead that has not fallen off when the left leg lead or the left hand lead falls off. The voltage value of the WCT center point can be used as a reference voltage for the chest lead, and the calculated value of the chest lead voltage is obtained according to the voltage value obtained from the right hand lead, so that the measured value of the chest lead voltage is obtained according to the voltage value and the calculated value of the WCT center point, thereby drawing the chest lead waveform. That is, when the left leg lead or the left hand lead falls off, a clear and definite chest lead waveform can still be obtained, thereby avoiding the problem of a messy or straight-line waveform in the chest lead waveform caused by the limb lead falling off.

[0038] Alternatively, when no limb lead drop occurs, the normal chest lead derivation steps are as follows: The calculation formula for Lead I is as follows: Lead I: I=LA-RA(1) The calculation formula for Lead II is as follows: Lead II: II=LL-RA(2) The calculation formula for Wilson Central Terminal is as follows: WCT=(RA+LA+LL) / 3(3) The formula for calculating chest lead voltage is as follows: Vx=Cx-RA(x represents 1-6)(4) The chest lead measurement formula is as follows: VX=Cx-WCT(5) According to formula (3), we can get the following formula: VX=Cx-(RA+LA+LL) / 3(6) Substituting formula (4) into formula (6), we get: VX=Vx+RA-(RA+LA+LL) / 3=Vx+(2RA-LA-LL) / 3(7) Since I+II=LA+LL-2RA, we can conclude that: VX=Vx-(I+II) / 3(8) VX corresponds to DATA3, DATA4, DATA5, DATA6, DATA7, DATA8.

[0039] When the limb lead LL or LA is dropped, the chest lead will display a straight line or a messy waveform, but the chest lead is not dropped, so it is necessary to correctly derive the waveform of the chest lead. Therefore, the present invention proposes a method for determining the chest lead waveform when the limb lead is dropped, as follows: When LL or LA limb loss occurs: The formula for calculating Lead I is as follows: Lead I: I=LA-RA(9) The calculation formula for Lead II is as follows: Lead II: II=LL-RA(10) If the LL or LA lead is missing, the WCT center point calculation formula is as follows: WCT=(RA+LA) / 2 or WCT=(RA+LL) / 2(11) The formula for calculating chest lead voltage is as follows: Vx=Cx-RA(12) Among them, x represents 1-6, Cx represents C1~C6, 6 electrodes, RA is the electrode connected to the right hand, and Vx is the voltage difference between the two.

[0040] The chest lead measurement formula is as follows: VX=Cx-WCT(13) Where VX is the voltage difference between Cx, C1~C6, 6 electrodes, relative to the center point (WCT).

[0041] According to formula (11), the following formula can be obtained: VX=Cx-(RA+LA) / 2 or VX=Cx-(RA+LL) / 2(14) Substituting formula (12) into formula (14), we obtain: VX=Vx+RA-(RA+LA) / 2 or VX=Vx+RA-(RA+LL) / 2(15) Since LA=RA+I, LL=RA+II, then: VX=Vx+RA-(2RA+I) / 2 or VX=Vx+RA-(2RA+II) / 2(16) VX = Vx-I / 2 (LL is off) or VX = Vx-II / 2 (LA is off) (17) VX corresponds to DATA3, DATA4, DATA5, DATA6, DATA7, DATA8.

[0042] For example, Figure 2 A flow chart of the chest conduction waveform drawing method provided by the present invention, such as Figure 2As shown, by collecting ECG waveforms, the connection status of the leads is determined, and whether the LA / LL leads are disconnected is determined. When the LA / LL leads are disconnected, the waveform calculation formula provided by the present invention is used to draw the chest lead waveform. When the LA / LL leads are not disconnected, the original waveform calculation formula is used to draw the chest lead waveform.

[0043] Figure 3 This is one of the schematic diagrams of the chest conduction waveform drawn when the LA is detached provided by the present invention. Figure 4 The second schematic diagram of the chest conduction waveform drawn when the LA is detached provided by the present invention is as follows Figure 3 and Figure 4 As shown, through the method for determining chest lead waveforms when limb leads are dropped provided by the present invention, when LA / LL leads are dropped, the waveforms drawn by the six chest leads V1 to V6 are all clear and definite waveforms.

[0044] In order to better implement the method for determining a chest lead waveform when a limb lead is dropped in an embodiment of the present invention, based on the method for determining a chest lead waveform when a limb lead is dropped, an embodiment of the present invention further provides a device for determining a chest lead waveform when a limb lead is dropped. Figure 5 A schematic diagram of the structure of an embodiment of a device for determining a chest lead waveform in the case of limb lead detachment provided by the present invention, as shown in FIG. Figure 5 As shown, the device 500 for determining the chest lead waveform in the case of limb lead detachment includes: A first determination module 510 is used to determine the voltage value of the WCT center point based on the voltage value obtained from the limb lead that has not fallen off when the limb lead falls off; the limb lead includes the left leg lead, the left hand lead and the right hand lead; A second determination module 520, configured to determine a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; The third determination module 530 is used to determine the measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value; the measured value is used to determine the chest lead waveform.

[0045] The device 500 for determining a chest lead waveform when a limb lead is detached provided in the above embodiment can implement the technical solution described in the embodiment of the method for determining a chest lead waveform when a limb lead is detached. The specific implementation principles of the above modules or units can be found in the corresponding contents in the embodiment of the method for determining a chest lead waveform when a limb lead is detached, and will not be repeated here.

[0046] Optionally, the third determining module 530 is specifically configured to: Determining a voltage difference between the leads of the limbs that have not been detached based on the voltage values ​​obtained from the leads of the limbs that have not been detached; The measured value is determined based on the voltage difference, the voltage value of the WCT center point, and the calculated value.

[0047] Optionally, the first determining module 510 is specifically configured to: The mean value of the voltage values ​​obtained from the leads of the undetached limb is determined as the voltage value of the center point of the WCT.

[0048] Optionally, the expression of the calculated value is as follows: Vx=Cx-RA Wherein, Vx represents the calculated value, x is 1-6, Cx represents the voltage value obtained by the electrode sheet, and RA represents the voltage value obtained by the right-hand lead.

[0049] Optionally, when the lost limb lead is the left hand lead, the expression of the measured value is as follows: VX=Vx-II / 2 Where VX represents the measured value, Vx represents the calculated value, and II represents the voltage difference between the left leg lead and the right hand lead.

[0050] Optionally, when the lost limb lead is the left leg lead, the expression of the measured value is as follows: VX=Vx-I / 2 Where VX is the measured value, Vx is the calculated value, and I is the voltage difference between the left-hand lead and the right-hand lead.

[0051] like Figure 6 As shown, the present invention also provides an electronic device 600. The electronic device 600 includes a processor 601, a memory 602 and a display 603. Figure 6 Only some components of the electronic device 600 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0052] In some embodiments, the processor 601 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run the program code or process data stored in the memory 602, such as the method for determining the chest lead waveform in the case of limb lead detachment in the present invention.

[0053] In some embodiments, the processor 601 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, the processor 601 may be local or remote. In some embodiments, the processor 601 may be implemented in a cloud platform. In some embodiments, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0054] In some embodiments, the memory 602 may be an internal storage unit of the electronic device 600, such as a hard disk or memory of the electronic device 600. In other embodiments, the memory 602 may also be an external storage device of the electronic device 600, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the electronic device 600.

[0055] Furthermore, the memory 602 may include both an internal storage unit of the electronic device 600 and an external storage device. The memory 602 is used to store application software installed in the electronic device 600 and various data.

[0056] In some embodiments, the display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an organic light-emitting diode (OLED) touch device, etc. The display 603 is used to display information on the electronic device 600 and to display a visual user interface. The components 601-603 of the electronic device 600 communicate with each other via a system bus.

[0057] In one embodiment, when the processor 601 executes the chest lead waveform determination program in the memory 602 when the limb lead is dropped, the following steps may be implemented: When a limb lead falls off, the voltage value of the WCT center point is determined based on the voltage value obtained from the limb lead that has not fallen off; the limb leads include the left leg lead, the left hand lead, and the right hand lead; Determining a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; Based on the voltage value of the WCT center point and the calculated value, a measured value of the chest lead voltage is determined; the measured value is used to determine the chest lead waveform.

[0058] It should be understood that: when the processor 601 executes the chest lead waveform determination program in the case of limb lead detachment in the memory 602, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the corresponding method embodiment above.

[0059] Furthermore, the embodiment of the present invention does not specifically limit the type of the electronic device 600 mentioned, and the electronic device 600 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic device may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 600 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0060] Accordingly, an embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, it can implement the steps or functions of the method for determining the chest lead waveform when the limb lead is detached provided in the above-mentioned method embodiments.

[0061] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the steps or functions of the method for determining the chest lead waveform in the case of limb lead detachment provided in the above-mentioned method embodiments.

[0062] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0063] The above is a detailed introduction to the method, device and medium for determining the chest lead waveform in the case of limb lead detachment provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for determining chest lead waveform when limb lead is dropped, characterized in that: include: When a limb lead is dropped off, the voltage value of the center point of WCT is determined based on the voltage value obtained from the limb lead that has not dropped off; The limb leads include left leg leads, left hand leads and right hand leads; Determining a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; Based on the voltage value of the WCT center point and the calculated value, a measured value of the chest lead voltage is determined; the measured value is used to determine the chest lead waveform.

2. The method for determining chest lead waveform when limb lead is dropped according to claim 1, characterized in that: The step of determining the measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value comprises: Determining a voltage difference between the leads of the limbs that have not been detached based on the voltage values ​​obtained from the leads of the limbs that have not been detached; The measured value is determined based on the voltage difference, the voltage value of the WCT center point, and the calculated value.

3. The method for determining chest lead waveform when limb lead is dropped according to claim 1, characterized in that: The step of determining the voltage value of the WCT center point based on the voltage value obtained from the lead of the undetached limb includes: The mean value of the voltage values ​​obtained from the leads of the undetached limb is determined as the voltage value of the center point of the WCT.

4. The method for determining chest lead waveform when limb lead is dropped according to claim 1, characterized in that: The expression of the calculated value is as follows: Vx=Cx-RA Wherein, Vx represents the calculated value, x is 1-6, Cx represents the voltage value obtained by the electrode sheet, and RA represents the voltage value obtained by the right-hand lead.

5. The method for determining chest lead waveform when limb lead is dropped according to claim 1, characterized in that: When the lost limb lead is the left hand lead, the expression of the measured value is as follows: VX=Vx-II / 2 Where VX represents the measured value, Vx represents the calculated value, and II represents the voltage difference between the left leg lead and the right hand lead.

6. The method for determining chest lead waveform when limb lead is dropped according to claim 1, characterized in that: When the lost limb lead is the left leg lead, the expression of the measured value is as follows: VX=Vx-I / 2 Where VX is the measured value, Vx is the calculated value, and I is the voltage difference between the left-hand lead and the right-hand lead.

7. A device for determining chest lead waveform when limb lead is dropped, characterized in that: include: A first determination module is used to determine the voltage value of the WCT center point based on the voltage value obtained from the limb lead that has not fallen off when the limb lead falls off; The limb leads include left leg leads, left hand leads and right hand leads; A second determination module, used to determine a calculated value of a chest lead voltage based on the voltage value obtained from the right hand lead; The third determination module is used to determine the measured value of the chest lead voltage based on the voltage value of the WCT center point and the calculated value; the measured value is used to determine the chest lead waveform.

8. An electronic device, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the method for determining the chest lead waveform when a limb lead falls off as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining a chest lead waveform in a case where a limb lead is dropped off as described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for determining a chest lead waveform in a case where a limb lead is dropped off as described in any one of claims 1 to 6 is implemented.

Images