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4981141 |
Wireless electrocardiographic monitoring system
An electrocardiographic monitoring system in which the heart-signal sensing electrodes are each coupled to the heart-signal monitor/recorder by respective wireless transmitters and corresponding...
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4974599 |
Portable electrocardiograph
A portable electrocardiograph which comprises a processing unit for outputting a display command signal for the display of an electrocardiographic wave, a display unit responsive to the display...
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4974601 |
Portable heart monitor performing multiple functions
A method and apparatus for monitoring multiple aspects of a patient's cardiac condition which is portable microprocessor based, and can be programmed to select (for storage in random access memory...
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4974598 |
EKG system and method using statistical analysis of heartbeats and topographic mapping of body surface potentials
The Heart State Analyzer (HSA) is a system and method in medical non-invasive electrocardiographic (EKG) analysis of human heart beats for the early detection of certain heart diseases in which a...
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4966157 |
Electrocardiograph operable to form updated sequential series of cardiographic signals
An electrocardiograph which includes a detecting circuit for detecting a cardiographic signal from a living body; a storage circuit for storing the cardiographic signal from the detecting circuit;...
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4964410 |
Time period and heart rate measurement system
A system for allowing interactive time measurement and comparison of events and indication of heart rate intervals is disclosed. A part of vertical lines, an anchor bar and a movable or measurement...
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4962767 |
Pacemaker catheter
An optimum placement, shape and orientation of catheter electrodes in a cardiac pacemaker system takes advantage of the peak-positive to peak-negative summative effect of a diphasic depolarization...
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4957115 |
Device for determining the probability of death of cardiac patients
A device for determining the probability of death in cardiovascular patients including an electrocardiograph adapted to deliver a signal in the form of an electrical waveform containing information...
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4951680 |
Fetal monitoring during labor
Apparatus for monitoring fetal health during labor detects the occurrence of a fetal ECG in digital signals derived from electrodes on a fetus using a matched filter routine to detect a QRS...
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4947858 |
Method and apparatus for data compression in an ECG monitoring system
A method and apparatus for data compression of input ECG beats in an electro-cardiograph system. The data compression method includes the steps of conditioning the analog input ECG beats into...
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4945917 |
Method and apparatus for indicating repetition intervals of a specified component of a composite electrical signal, particularly useful for displaying fetal r-waves
The method and apparatus particularly are applicable for displaying the fetal R-wave with respect to the maternal R-wave, and comprise the steps of generating a first electrical signal...
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4938229 |
Method and apparatus for transmitting data descriptive of electromagnetic waveform
A method and apparatus for transmitting data descriptive of an electromagnetic waveform wherein a constant amplitude signal is frequency modulated and transmitted to a remote site where digital...
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4934376 |
Method and apparatus for detecting heartbeats
Method and apparatus for detecting the occurrence of heartbeats in an ECG signal which may also include pacer artifacts, comprising analysis of the ECG signal for providing a heartbeat signal...
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4934377 |
Intraoperative neuroelectrophysiological monitoring system
The add-on circuit arrangement permits selective muting of noise signals which are caused by electrosurgery and by a stimulus source during neurophysiological monitoring of a surgical patient....
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4930075 |
Technique to evaluate myocardial ischemia from ECG parameters
As a method of diagnosing ischemia non-invasively, the effective component of the ST-segment depression (STe) of an electrocardiogram is measured. A precise mathematical relationship between the...
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4919145 |
Method and apparatus for sensing lead and transthoracic impedances
A method and apparatus for use with medical electrode systems that sense the integrity of lead connections and patient transthoracic impedance is provided. In an ECG electrode application, a...
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4913146 |
Cardiac sense amplifier with pattern recognition capabilities
A cardiac sense amplifier network includes a differential amplifier, a bandpass filter, a comparator network, a microprocessor, an analog-to-digital converter, and a random-access memory. The...
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4905705 |
Impedance cardiometer
A heart monitoring system for assessing a patient's cardiac condition. Bioimpedance components induce an electric current through the thorax of a patient's body and a first signal representing...
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4901726 |
Rate-responsive, distributed-rate pacemaker
A rate-responsive heart pacer in which rate-control parameter (RCP) values are arranged in a percentile ranking and mapped onto a percentile ranking of a desired rate distribution. By monitoring...
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4899760 |
Noise rejecting detector for biomedical signals
An improved biological signal detector which is extremely sensitive, yet resistant to the effects of high frequency noise. A multiplexed signal representation of a plurality biological signals is...
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4898182 |
Apparatus for evaluating heart fitness
A heart fitness evaluation system is set up in booth form in which a participating person may have the fitness condition of his heart evaluated based on a step test protocol. Personalized data is...
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4896677 |
Electrocardiographic waveform display apparatus, and method of expressing electrocardiographic waveforms
An electrocardiographic waveform recorder, analyzer, printer and display for superimposing in synchronization, for a predetermined period of time, ECG waveforms. The waveforms are superimposed and...
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4893632 |
Method and apparatus for comparing waveform shapes of time-varying signals
A method and apparatus for comparing waveshape portions of at least one time-varying signal by first forming initial templates of digital signal samples representative of the amplitude of...
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4889134 |
Device for measuring multiple channels of heartbeat activity and encoding into a form suitable for simultaneous transmission over
A device for measuring electrical activity of the heart of a user. The portable device includes structure for receiving at least two leads of electrical activity of the heart of the user. This...
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4889123 |
Method for determining heart rate
Disclosed is a system, apparatus and method for gathering physiological data. Basic to the system of the present invention is a rigid body mold having preferably a negative impression of the dorsal...
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4887609 |
Apparatus and method for filtering electrocardiograph signals
Apparatus and method for filtering the electrocardiograph (ECG) signal of a patient of unwanted signals, such as contamination signals produced by the use of nuclear magnetic resonance imaging...
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4883064 |
Method and system for gathering electrocardiographic data
A method of gathering electrocardiographic data is disclosed wherein the EKG data is collected by sequentially monitoring the difference in electrical potential measured at each of at least three...
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4883065 |
Micropotential analyzer--a Holter system with comprehensive analysis capability for very low amplitude electrocardiographic signals and method
A system for detection, measurement, analysis and plotting of electrocardiographic signals with amplitudes ranging down to one microvolt (micropotentials) employing long term ambulatory (Holter)...
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4882754 |
Data compression system and method with buffer control
In a digital encoder, truncation is controlled by the fullness of the output rate-smoothing buffer. A signal compression system is shown for processing a stream of fixed length digital sample...
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4870578 |
Diastolic clamp for bioimpedance measuring device
An electrical bioimpedance measuring device is used to measure changes in the electrical resistance of a segment of the thorax of a human body caused by changes in the blood perfusion in that...
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4865039 |
Dry electrode system for detection of biopotentials and dry electrode for making electrical and mechanical connection to a living body
A dry electrode system for the detection of biopotentials existing on the surface of the skin of a living body, including a dry electrode pad with a resilient conductive pad adhering to at least...
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4862897 |
Electrocardiogram enhancement system and method
An electrocardiogram enhancement system and apparatus is provided. Small amplitude, high frequency notches associated with myocardial disease and arrhythmias can be recorded by conventional chart...
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4862896 |
Monitoring device with dual position electrodes
A heart monitoring device for use under emergency conditions including a portable housing, a pair of electrodes and a pair of electrical wires connecting the electrodes to the housing and to an...
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4858617 |
Cardiac probe enabling use of personal computer for monitoring heart activity or the like
A compact and economical probe unit has projecting electrodes for sensing minute voltage variations at spaced apart locations on a persons skin or other surface. Internal circuits generate serial...
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4850356 |
Defibrillator electrode system
A defibrillator cable is provided in two separate embodiments. In one embodiment, the conventional paddles and their associated leads are replaced by the present defibrillator cable, which includes...
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4848350 |
Method for recording an electrocardiogram
Disclosed is a system, apparatus and method for gathering physiological data. Basic to the system of the present invention is a rigid body mold having preferably a negative impression of the dorsal...
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4844090 |
Pencil type heart potential waveform measuring device
In this pencil type heart potential waveform measuring device, a first electrode is provided at the tip of a substantially round bar-like pencil device body, a second electrode is separated from...
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4825874 |
Cardiac diagnosis instrument
According to the present invention there is provided a cardiac diagnosis instrument including an elongated housing, diagnosis electronics accommodated within the housing and two pick-up electrodes...
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4803996 |
Cardiovascular monitor
A cardiovascular monitor having improved safety features and data transmission ability. Sensing devices placed on a patient's body, such as electrocardiogram electrodes and phonocardiogram...
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4800894 |
Protection of EKG monitor against electrical surgical interference
A protective device for an EKG monitor for use in surgical electrocautery which employs an electrocautery surgical knife supplied with radio frequency power and an EKG monitoring apparatus having...
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4802222 |
Data compression system and method for audio signals
Audio signals such as ECG, speech and music are digitally processed to reduce the bit-rate needed for accurate transmission, known as minimizing the entropy of the signal. The transmitter features...
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4796638 |
Artifact detecting apparatus in the measurement of a biological signal
An apparatus for detecting a high frequency artifact contained in an electrocardiogram signal is disclosed, which enables the presence of the high frequency artifact to be detected with a high...
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4793361 |
Dual channel P-wave detection in surface electrocardiographs
A method and apparatus for reliably detecting the P-wave component in a surface electrocardiograph. An adaptive Least Means Square filter is implemented in a programmed computer and the computer...
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4791933 |
Radio electrocardiography for a living body moving in the water
A method of diagnosing the heart condition of a living body moving in the water, in which an electrocardiogram recorded by the steps of hermetically contacting electrodes on the skin surface of the...
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4785812 |
Protection system for preventing defibrillation with incorrect or improperly connected electrodes
A protection circuit for a defibrillator that prevents a defibrillator pulse from being generated if the impedance between the defibrillator's electrode leads is not characteristic of the impedance...
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4784153 |
Method of and apparatus for detecting cardiac rhythm disturbance
A method for generating audio information to indicate the presence and nature of a cardiac rhythm disturbance is disclosed. More specifically, this method produces sounds which accompany atrial and...
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4781201 |
Cardiovascular artifact filter
For suppressing cardiovascular artifact from a respiration signal derived from a patient's transthoracic impedance, an adaptive filtering device determines the patient's heart rate, converts the...
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4779617 |
Pacemaker noise rejection system
A noise rejection circuit for an implantable pacemaker. During re-triggerable relative refractory periods following a heartbeat, the peak noise level is sensed; the relative refractory period is...
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4773427 |
Water-proof device for transmitter
A water-proof device for a transmitter is disclosed which comprises a plurality of water-proof electrodes attached to the surface of a man for deriving minute electrocardiogram signals. A...
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4754762 |
EKG monitoring system
An audio-visual EKG monitoring system that segments components of the patient's EKG waveform and synthesizes a plurality of audio driving signals, each representing peak values of the segmented...
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