Matches 101 - 150 out of 150 < 1 2 3
Match Document Document Title
4999772 Sleep screening system with time based modulated data  
A portable sleep monitoring system for recording on tape, transcribing and charting a plurality of physiologic data channels recorded relative to a known constant, user-transparent time base....
4967756 Blood pressure and heart rate monitoring method and apparatus  
Improved ambulatory blood pressure and heart rate monitoring and recording apparatus and method are described. The apparatus uses an auscultatory transducer connected to a microprocessor-based...
4961429 Diastolic pressure sensor  
An arterial pressure pulse is sensed and the next succeeding Korotkoff sound is sensed and the time lag between the two is measured. When the time lag between the two cannot be measured, the cuff...
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...
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...
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...
4809681 Electrocardiographic measurement method for controlling an intra-aortic balloon pump  
A pair of spaced electrodes are disposed inside the thoracic aorta near the heart and are used to sense R- and P-waves in an ECG signal. The electrodes are moved to an ideal intra-aortic position,...
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...
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...
4729379 Digital subtraction-imaging apparatus utilizing cardiac-synchronized subtraction method  
In a digital subtraction imaging apparatus, the digital subtraction between mask images and contrast images is carried out in synchronism with cardiac beats of an object under medical examination...
4716903 Storage in a pacemaker memory  
An implantable pacemaker which stores in memory the representation of an ECG signal by compressing the data. Whenever the input signal changes by a threshold amount from the last time data was...
4677984 Calibrated arterial pressure measurement device  
An apparatus and method are disclosed for measuring and recording the arterial blood pressure waveform or a portion thereof in a patient by detecting the momentary increases in pressure in an...
4649931 Sampled data sense amplifier  
A sense amplifier for a cardiac pacemaker which has an amplifier section with two feedback paths. One path contains small valued capacitors and clock activated switches to form a discrete time...
4630204 High resolution ECG waveform processor  
A waveform processor for processing waveforms of the ECG type from surface electrodes connected to the human body. Differential lead waveforms are sampled by a fast, high resolution A/D converter...
4617938 Method and system for distinguishing R-wave electrocardiograph signals for synchronizing purposes  
An improved ECG system for on-line analysis of the signals received from exercise ECGs whereby the signals from at least a pair of electrodes are differentiated and compared to find maximum slopes...
4616659 Heart rate detection utilizing autoregressive analysis  
A system for determining the heart rate in response to an electrocardiogram (EKG) signal that has been filtered by performing an autoregressive analysis, low-pass filtered by performing a digital...
4611340 Apparatus for examining a biological object by using radiation  
In an angiographic apparatus, operation timings of an entire system, e.g., an X-ray generator, an X-ray detector, a transmission image processor, and an injector for X-ray contrast medium are...
4583553 Ambulatory ECG analyzer and recorder  
An ambulatory cardiac analyzer and recorder includes an allocation and priority scheme which has quotas for classes of QRS events and priority between types of events within a class. The quality of...
4537201 Process and device for detecting the response of the heart to an electrical stimulation pulse  
The present invention relates to a process and device for detecting the response of the heart to an electrical stimulation pulse, comprising: collecting, after the end of the stimulation pulse, a...
4509529 Physiological event recognition techniques for use with a delta modulator  
The signal sensed on a heart pacer electrode is converted by a delta modulator to a sequence of samples of 0 and 1 bit values. The resulting bit sequence is delayed, and the original bit sequence...
4495950 QREEG Process matrix synchronizer system  
A QREEG matrix synchronizer system under the aegis of a "master" QREEG tracing has electrodes and sensors for obtaining new computational diagnostic relationships between EEG, EKG, and other...
4478224 Artifact detector for heartbeat rate measuring system  
A heartbeat rate measuring system for monitoring a patient's EKG signal and estimating heartbeat rate. The system includes an artifact detection apparatus for filtering the EKG signal to detect the...
4446868 Cardiac arrhythmia analysis system  
A method and apparatus for analyzing cardiac electrical activity and producing a signal representative of the occurrence of a QRS complex. A signal representative of cardiac electrical activity is...
4440176 Digitally programmable cardiac synchronized high frequency jet ventilator control system  
A delta modulator has its feedback loop components selected to put the delta modulator into slope overload in response to the QRS wave of an EKG signal for detecting the same.
4417306 Apparatus for monitoring and storing utilizing a data processor  
Apparatus for monitoring and storing heart activity signals is disclosed as including a data processor illustratively in the form of a digital microprocessor. The monitoring and storing apparatus...
4367753 Apparatus for monitoring and storing heartbeats of a patient  
Apparatus for monitoring and storing electrical signals indicative of a patient's heart activity is disclosed as including a memory comprising a first plurality of storage locations for receiving a...
4342318 Physiological waveform processor  
Apparatus for processing waveform signals of physiological origin. The apparatus includes circuitry for developing a signal representative of the peak-to-peak amplitude between each waveform signal...
4325384 Digitally controlled amplitude regulating device for electrocardiographic signals  
A signal processing device composed of: a signal input for receiving an electrocardiographic signal containing a succession of QRS complexes; a signal output; a digitally operating unit having a...
4316249 Automatic high speed Holter scanning system  
An automatic high speed Holter scanning system operates in a nonautomatic mode or in an automatic mode to receive electrocardiogram signals which have been prerecorded in dissimilar formats having...
4263919 Heartbeat detection and artifact discrimination method and apparatus  
Apparatus for discriminating between heartbeat and artifact information contained in an ECG signal includes a pair of difference amplifiers, level-detecting circuitry and a coincidence detector....
4250889 Heartbeat occurrence detector  
Apparatus for monitoring the heartbeat of a person by screening the occurrence of a heartbeat from artifact to produce a signal indicative of the heartbeat occurrence. Screening circuitry detects...
4248240 Apparatus for detecting the activity of the respiratory organs and the heart of a living being  
Apparatus for detecting the activity of the respiratory organs and the heart of a living being, using passive measuring electrodes applied to the surface of the skin. The apparatus comprises a pair...
4240442 Variable threshold R-wave detector  
An improved R-wave detector is provided for use in monitoring and/or analyzing electrical heart waveforms. Generally conventional R-wave detection means employ automatically variable scaling means...
4237903 QRS detector for EKG signals  
An improves QRS detector is disclosed which utilizes a comparison between the arithmetic mean value of the filtered and full wave rectified EKG signal and such EKG signal reduced by a...
4216779 Blood pressure monitoring system  
Apparatus is disclosed for long-term ambulatory monitoring of blood pressure by an auscultation method, employing a pressurizable cuff and requiring no intervention by the patient. Heartbeats are...
4192318 Method and apparatus for locating the QRS portion of an electrocardiographic signal  
A method and improved apparatus for automatically locating the QRS portion of an electrocardiographic signal and for generating a corresponding synchronization pulse is disclosed. Properties...
4157711 Electrocardiograph apparatus capable of discerning the H-wave in the P-Q interval  
Electrocardiograph apparatus capable of discerning the H-wave in the P-Q interval of an ECG signal comprises a charge transfer device delaying the ECG signal and a signal averager circuit...
4023564 Arrhythmia detector  
The amplitude of each R wave of an electrocardiogram signal at each of a plurality of sample points is compared with reference values representing amplitudes of a reference template at the sample...
4000461 R-wave detector  
An electronic system is disclosed which examines the first derivative of an applied electrocardiographic (ECG) signal, recognizes the R-wave event therefrom, and discriminates against signal...
3995624 Installation for the processing of EKG signals  
An installation for the processing of EKG signals, including a threshold element for the detection of the R-waves or displays in the EKG; and with a signal suppressor element which suppresses the...
3968430 Installation for the detection and processing of electrical signals  
An installation for the detection and, respectively, processing of electrical signals, in particular, physiological measuring signals, for example EKG, through the intermediary of a filter...
3939824 Physiological waveform detector  
A physiological waveform detector such as for cardiac R-wave and blood pressure uses a comparator to compare the derivative of the waveform signal with a reference signal representing some...
3853119 METHOD AND SYSTEM FOR DISPLAY OF ELECTROCARDIOGRAPHIC (ECG) SIGNALS  
The method and system is described for displaying electrocardiograhic (ECG) signals on a cathode ray oscilloscope. The R wave components of the recurring ECG signals are detected and used to...
3820025 METHOD OF APPARATUS FOR GENERATING AN R-INTERVAL HISTOGRAM  
A method and apparatus for automatically and directly generating a graphical data display, particularly an R-interval histogram, over a monitoring time period in which data is continuously...
3590811 ELECTROCARDIOGRAPHIC R-WAVE DETECTOR  
An electrocardiographic R-wave detection circuit in which the ECG. signal is applied to one input of a comparator. The threshold level, applied to the other input of the comparator, is below the...
3520295 CARDIAC R-WAVE DETECTOR WITH AUTOMATIC GAIN CONTROL  
3457452 DISPLAY OF REPETITIVE ANALOG DATA  
3129704 Electronic cardiac programmer  
2829637 Heart beat indicator  
3605727 Title is not available  
Matches 101 - 150 out of 150 < 1 2 3