268 results about "Cardiac rate" patented technology

An abnormally rapid ventricular cardiac rate that results from atrial fibrillation can be reduced by stimulating a vagal nerve of the heart. An apparatus for such stimulation includes a power transmitter that emits a radio frequency signal. A stimulator, implanted in a blood vessel adjacent the vagal nerve, has a pair of electrodes and an electrical circuit thereon. The electrical circuit receives the radio frequency signal and derives an electrical voltage from the energy of that signal. The electrical voltage is applied in the form of pulses to the pair of electrodes, thereby stimulating the vagal nerve. The pattern of that stimulating pulses can be varied in response to characteristics of the atrial fibrillation or the ventricular contractions.

A system and method for calculating an engagement value by quantifying an amount that a user is acting without thinking considering brainwaves and a heart rate can be used to compare media based on an individual or a group of individuals. Events of the media can be contrasted and compared by the engagement value as well. Statistical measurements may be taken to improve media.

A system and method for detecting and classifying cardiac arrhythmias based on cardiac pressure signals or the combination of cardiac electrical and cardiac pressure signals. A cardiac electrogram signal is sensed to derive a cardiac rate from which an arrhythmia detection is made when the cardiac rate meets arrhythmia detection criteria. An intracardiac pressure signal is sensed to derive an indicator of tachycardia based on an analysis of the pressure signal in either the time domain or frequency domain. The detected arrhythmia is classified as tachycardia or fibrillation based on the tachycardia indicator wherein the tachycardia indicator is compared to tachycardia detection criteria and the arrhythmia is classified as tachycardia if tachycardia detection criteria are met and the arrhythmia is classified as fibrillation if the tachycardia detection criteria are not met.

A system (10) for achieving a desired cardiac rate and cardiac rhythm in response to atrial fibrillation in a heart includes an atrial fibrillation (AF) detector (40) for detecting AF. The system also includes an atrioventricular node vagal stimulator (AVN-VS) (30) for stimulating vagal nerves associated with an atrioventricular (AV) node of the heart. The system further includes an on-demand pace maker (40) for providing ventricular pacing stimulation to the heart. A control unit (20) is operatively connected with the AF detection device, the AVN-VS device, and the on-demand pacing device. The control unit is responsive to AF detection by the AF detector to cause the AVN-VS to stimulate the vagal nerves to help reduce the ventricular rate of the heart. The control unit is further responsive to AF detection by the AF detector to cause the on-demand pace maker to help regulate the ventricular rate of the heart.

An improved pacemaker has a hysteresis feature that activates accelerated pacing during periods of sinus arrest and/or extreme bradycardia. When the patient's intrinsic heart rate drops below a hysteresis rate, the pacemaker reverts to a programmable accelerated rate or to the average cardiac rate. Accelerated pacing is delivered for a programmable period of time, after which the pacing rate is gradually reduced toward a lower rate. If a desirable intrinsic rate is not attained after the pacing rate is reduced to the lower rate, the intervention cycle repeats.

The invention provides an electricity-saving control method of a wearable intelligent device. The method includes the following steps that the wearable intelligent device is set to be in a real-time mode when a service App is started and a foreground works; the wearable intelligent device is set to be in a normal mode when the service App is stopped and a background works; in the real-time mode or the normal mode, the wearable intelligent device acquires current time and position information, and whether heart rate data are found or not is detected; when it is judged that the current time is in the preset sleeping time segment, the position information does not change and the received heart rate data are normal, the wearable intelligent device is automatically switched into a sleep electricity-saving mode; when it is judged that the current time is not in the preset sleeping time segment or the position information changes, the wearable intelligent device is automatically switched into the normal mode from the sleep electricity-saving mode. The invention further provides the wearable intelligent device. Through the method, the power consumption of the wearable intelligent device can be reduced, and the stand-by time can be effectively prolonged.

The invention discloses a multi-life monitoring system based on FMCW (frequency modulated continuous wave) wideband radar. The multi-life monitoring system comprises a transmitting unit, a receiving unit, a signal processing unit and a wireless signal transmitting unit; an FMCW signal is transmitted from the FMCW wideband radar to no less than one human object by virtue of the transmitting unit; a reflected echo signal is received by virtue of the receiving unit; the echo signal, which carries vital sign signals, is processed by virtue of the signal processing unit; the vital sign signals are demodulated and separated from the echo signal; and the vital sign signals are transmitted to a computer terminal by virtue of the wireless signal transmitting unit, so that respiration and heartbeat signals of detected persons are monitored under the condition of avoiding contact with the bodies of the detected persons. With the implementation of the multi-life monitoring system disclosed by the invention, under the circumstance of avoiding the contact of any electrodes and sensors with patients, the respiration and heart rates of the plurality of patients can be simultaneously monitored by a long time at a relatively long distance, so that the detected persons can feel more easily and comfortably; the multi-life monitoring system can be widely applied to clinical dynamic monitoring and sleep quality monitoring of patients with severe burn and the like; and meanwhile, the multi-life monitoring system can be also applied to researches in the field of psychology.

Conventionally, when a biological information collecting device is used for measurement, an electrode is directly attached to a human body, accurate information cannot be collected and measurement through a lead wire is performed, for long time constraining the human body because of the lead wire. A device proposed to solve the problem comprises a capacitive sensor used for detecting a signal from the human body, and therefore the temperature characteristics are not good, bringing out a drawback that the signal varies in a low-frequency range. A biological information collecting device according to the invention comprises a closed pneumatic sound sensor having a gas-tight air bag made of soft rubber, plastic, or cloth or a cabinet made of metal, rubber, plastic, or wood. Biological information about the respiration, the cardiac rate (cardiac cycle), and the body movement due to, e.g. a cough or a snore is collected by a microphone of a pressure sensor to perform measurement without constraining the human body, thereby solving the problem of the conventional devices.

A system (10) for achieving a desired cardiac rate and cardiac rhythm in response to atrial fibrillation in a heart includes an atrial fibrillation (AF) detector (40) for detecting AF. The system also includes an atrioventricular node vagal stimulator (AVN-VS) (30) for stimulating vagal nerves associated with an atrioventricular (AV) node of the heart. The system further includes an on-demand pace maker (40) for providing ventricular pacing stimulation to the heart. A control unit (20) is operatively connected with the AF detection device, the AVN-VS device, and the on-demand pacing device. The control unit is responsive to AF detection by the AF detector to cause the AVN-VS to stimulate the vagal nerves to help reduce the ventricular rate of the heart. The control unit is further responsive to AF detection by the AF detector to cause the on-demand pace maker to help regulate the ventricular rate of the heart.

A standard 3-lead electrcardiographic (ECG) monitoring system which is based on a wireless sensor network, comprising a management center, a patient monitor node, a sensor network node which is composed of a patient monitoring node and a collective node, and a digital processing terminal, wherein, the patient monitoring node communicates with the collective node; all the collective nodes communicate with each other; the collective node, the digital processing terminal and the management center communicate with each other. The patient monitoring node comprises a sensor input unit, a data processing unit, a data transmission unit and a power unit which are connected with each other in sequence; the data processing unit, the data transmission unit and the power unit are connected with the collective node. The invention combines the wireless sensor network and the ECG monitoring digitization, the disease rate can be predicted effectively by only carrying one monitoring patient node, which provides an important objective base for clinical analysis. The system achieves the combination of the standard 3-lead synchronous ECG, and variability of cardiac rate, etc., and can display a complete figure on which an identical cardiac cycle is on different orientations and different leads.

The invention discloses a real-time video emotion analysis method and system based on deep learning. The analysis method comprises the following steps of S1, obtaining a training data set; S2, recognizing microexpressions of the training data set through an algorithm based on a deep neural network, performing screening, and outputting 8 kinds of expression predicating values, wherein 8 kinds of expressions comprise a gentle expression, a happy expression, an amazed expression, a sad expression, an angry expression, a disgusted expression, a fear expression and a despised expression; S3, predicating shot human expressions through a heart rate algorithm, and obtaining corresponding heart rate values; and S4, comparing the heart rate values obtained in the step S3 with the expression predicating values obtained in the step S2, and outputting the expressions the same as the heart rate values obtained in the step S3. According to the real-time video emotion analysis method and system basedon deep learning disclosed by the invention, human face recognition in machine vision and an image classification algorithm are applied to detection of microexpressions and the heart rate, recognitionof the microexpressions is realized through the deep learning algorithm, and the real-time video emotion analysis method and system based on deep learning can be applied to the clinical field, the juridical field and the security field.

A fetal heart rate monitor (FHRM) (100) useful for locating fetal heartbeat (FHB) and monitoring the fetal heart rate, the FHRM comprising: at least one Doppler transducer (101); at least one processor (102); and, at least one communication module (103); the FHRM is operative in a method of (400): obtaining an FHRM comprising at least one Doppler transducer; at least one Doppler transducer comprises a high frequency mode and a low frequency mode (401); placing the Doppler transducer around the abdomen of an expectant mother (402); setting the Doppler transducer to the low frequency mode; the low frequency mode has a wide beam that facilitates the location of said FHB (403); moving the Doppler transducer past the abdomen until a location where said FHB signal is found (404); switching the Doppler transducer to the high frequency mode whilst keeping the Doppler transducer in the location for receiving an FHB signal; the high frequency has a narrow beam adapted for concentrating and receiving accurate fetal heart rate (FHR) readings resulting in improved signal to noise ratio (405); and detecting by means of said FHRM said FHB signals (406).

A LoRa bracelet-based student campus positioning system belongs to the field of remote monitoring technology, including a card reader, a LoRa bracelet, a LoRa gateway, a cloud server, and a monitoring platform. The card reader senses and reads the information of the LoRa bracelet by emitting low-frequency radio waves, and the LoRa bracelet collects the student's body temperature, life and movement characteristics, and the LoRa gateway connects multiple LoRa bracelets based on the LoRaWAN network. Records of students entering and leaving the school, location information, heart rate, temperature, and exercise data are sent to the cloud server. The monitoring platform connects to the cloud server through the data access layer and displays abnormal bracelet information, such as high fever of students, lack of attendance, etc., school management Based on the above prompts, the staff will send a short message or email to the corresponding student head teacher, and receive the feedback reported by the student head teacher. The invention solves the problems of high power consumption, small monitoring range and single function of the traditional campus positioning system.

The invention discloses an IPPG-based human body vital sign perception system, belonging to the technical field of physiological parameter detection. The objective of the invention is to solve the problems that conventional physiological parameter detection means need to be in direct contact with the skin of a detected person, are not applicable to burned and scalded patients or newborns, easily cause discomfort of subjects after long-time use, can aggravate the illness risk of detection personnel when the patients are in contact with infectious diseases, etc. According to the invention, a face video is processed through an image preprocessing module, and an ROI area of each frame of a picture of the video is obtained by extraction; RGB channel separation is carried out on the ROI area ofeach frame of the picture through an IPPG signal acquisition module, and the gray average of the ROI areas of three separated color space sequence pictures is calculated to obtain three IPPG curves ofRGB three-color channels; the three IPPG curves are processed through an IPPG signal processing module to obtain an improved IPPG signal; and the physiological parameter calculation module calculatesa heart rate and a respiration rate according to the IPPG signal improved by a green channel, and a oxyhemoglobin saturation value is calculated according to the IPPG signal improved by red and bluechannels.

A pulmonary artery blood oxygen saturation monitoring device based on an optical fiber sensor is disclosed, wherein an input end of a driving circuit is connected with a computer, and the output end of the same is connected with two LED light sources, light signal is incident into a focusing lens; a probe system comprises two routes of optical fiber sensing lines, one end of a first route of optical fiber is connected with a gem crystal probe, and the other end is connected with the focusing lens; one end of a second route of optical fiber is connected with the gem crystal probe, and the other end is connected with a photoelectric converter via light signal; the two routes are staggered back and forth, the energy of the first route LED light source of optical fiber is transmitted to the surface of an air path via optical fiber and the gem crystal probe, enters pulmonary artery through the air path, returns to the internal side of the air path after being subjected to the diffuse reflection of the photon acted with blood, and is absorbed by the second gem crystal probe of the second route, light signal after optical fiber transmissison is absorbed by the photoelectric converter, enters a computer after amplified shaping circuit and data acquisition, and gives out parameters such as pulmonary artery blood oxygen saturation, cardiac rate and the like by software processing. The invention can realize high-precise real time monitoring without trauma.

An implantable medical device operates to promote intrinsic ventricular depolarization according to a pacing protocol. When a cardiac rate exceeds a predetermined threshold, the implantable medical device modifies the pacing protocol parameters to promote AV synchrony.

An implantable cardiac stimulation device provides accelerated delivery of defibrillation therapy to a patient's heart. The device includes a sensing circuit that provides right and left heart cardiac activity signals and a detector that detects an accelerated arrhythmia of the patient's heart and establishes a plurality of accelerated cardiac rate zones including a fibrillation rate zone and at least one intermediate rate zone. A classifier responsive to the right and left heart cardiac activity signals classifies an accelerated arrhythmia as one of fibrillation and tachycardia responsive to the detector detecting an accelerated arrhythmia having a cardiac rate within the at least one intermediate rate zones. A therapy circuit applies defibrillation to the heart responsive to the classifier classifying an accelerated arrhythmia as fibrillation and anti-tachycardia pacing to the heart responsive to the classifier classifying an accelerated arrhythmia as tachycardia.

The invention discloses an automobile driving fatigue relieving method, electronic equipment, a fatigue driving judgment method and a server. The automobile driving fatigue relieving method comprisessteps that the timing information is sent to a server regularly; the fatigue judgment result which is returned by the server and is judged according to the received timing information is received; ifthe fatigue judgment result is fatigue driving, fatigue relieving operation is executed. The method does not need to recognize fatigue based on an eyeball tracking system and a heart rate detection system which are high in cost, cost is relatively better, and the very good fatigue relieving effect can be achieved in combination with air conditioner and audio recommendation adjustment.