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7604603 |
Method and system for extracting cardiac parameters from plethysmographic signals
A method and system for extracting cardiac parameters from a plethysmographic signal is described wherein the plethysmographic signal is passed through a first filter to remove non-cardiac...
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7603168 |
Method and apparatus for the estimation of anesthesia depth
A method and apparatus to monitor and control the anesthesia state of a patient undergoing general anesthesia is provided. Previous automated systems to monitor the anesthesia state of a patient...
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7593557 |
Methods of signal processing of data
A method of signal processing of data using a computer by generating a symbolic map of the data using at least one wavelet transform, identifying target sequences in the symbolic map; and...
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7512438 |
Implantable system for monitoring the condition of the heart
A “tracker system” that includes electrical leads which are part of an implanted cardiotracker plus external equipment that includes external alarm and a physician's programmer. The tracker...
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7330761 |
Baseline adaptation for cardiac pacing response classification
Methods and devices for establishing and using baseline for cardiac pacing response detection are described. A baseline amplitude of the cardiac signal may be established using data acquired in an...
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7291111 |
Apparatus and method for non-invasive diagnosing of coronary artery disease
A non-invasive diagnostic tool and method for detecting an obstruction in a coronary artery, the diagnostic tool including a signal processor adapted to receive signals corresponding to a heart...
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7215993 |
Cardiac rhythm management systems and methods for detecting or validating cardiac beats in the presence of noise
This document describes systems, devices, and methods for detecting or validating cardiac beats, such as in the presence of myopotential or other noise. In one example, an amplitude peak, which is...
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7209779 |
Methods and software for retrospectively gating a set of images
Methods, devices, and software for selecting image slices. The image slices are preferably taken during a quiet part of the patient's heart cycle in which the heart is relatively motionless so as...
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7174204 |
Methods for quantifying the morphology and amplitude of cardiac action potential alternans
Methods and apparatus for determining T-wave alternan signatures (i.e., morphology and polarity) derived from a physiologic signal representative of a subject's heart activity; assessing changes in...
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7171269 |
Method of analysis of medical signals
A method of analysis of medical signals which uses wavelet transform analysis to decompose cardiac signals. Apparatus for carrying out the method, and cardiac apparatus adapted to employ the method...
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7146206 |
Detection of cardiac arrhythmia using mathematical representation of standard ΔRR probability density histograms
A method and a system for detecting cardiac arrhythmias that includes detecting RR intervals of the patient wherein each RR interval is an interval between two heart beats, and simulating standard...
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7139605 |
Heart rate monitor
A method for analyzing an EKG signal in real time to produce a heart rate indication. The most recent digitized samples of the EKG are stored in a buffer and evaluated to identify each R-wave peak...
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7123953 |
Method and system for evaluating arrhythmia risk with QT-RR interval data sets
A method of assessing the cardiac arrhythmia risk in a subject to provide a measure of cardiac or cardiovascular health in that subject is described herein. In one embodiment, the method comprises...
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7120485 |
Method and system for detection of cardiac arrhythmia
There are many different serious cardiac arrhythmias. The present invention uses measurements of RR intervals (interbeat intervals) to detect, in particular but not exclusively, atrial fibrillation...
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7099380 |
Apparatus for antenna diversity for wireless communication and method thereof
A method and an apparatus for selecting an antenna from an antenna diversity array in a wireless communication system are provided. The method includes the steps of modulating an incoming signal...
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7069069 |
Implantable cardiac device for and method of monitoring progression or regression of heart disease by quantifying morphological features
An implantable cardiac device and method provides for monitoring a progression or regression in heart disease during an extended time period. A sensor generates an electrogram signal representing...
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7027858 |
Methods and apparatus for cardiac R-wave sensing in a subcutaneous ECG waveform
The present invention uses a R-wave sensing algorithm that uniquely combines an automatic threshold adjustment method with a new noise rejection technique. This algorithm has significant advantages...
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6968227 |
Methods for processing electrocardiac signals having superimposed complexes
Computer implemented methods and associated systems are disclosed for processing electrical signals recorded from the heart and, more particularly, for objectively deriving sub-components and...
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6942622 |
Method for monitoring autonomic tone
A method for monitoring the progression of the hemodynamic status of a patient by tracking autonomic tone. For example, the method may be applied to patients suffering from heart failure, diabetic...
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6941166 |
Software controlled electrophysiology data management
Methods for conducting an electrophysiology procedure using a programmed machine are described, including methods for managing discrete data capture requests received throughout the course of an...
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6937888 |
Signal evaluation method for detecting QRS complexes in electrocardiogram signals
A signal evaluation method for detecting QRS complexes in electrocardiogram (ECG) signals comprises the following steps:
sampling of the ECG signal ( 4 ) and conversion into discrete signal...
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6871089 |
Portable ECG monitor and method for atrial fibrillation detection
An apparatus and method for detecting an atrial fibrillation through monitoring the R—R intervals of a patient's QRS complexes. Ratios of the current R—R interval are made to previous R—R...
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6783498 |
Method and system for extracting cardiac parameters from plethysmographic signals
A method and system for extracting cardiac parameters from a plethysmographic signal is described wherein the plethysmographic signal is passed through a first filter to remove non-cardiac...
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6731972 |
Evaluation method and apparatus for determining the time stationarity of measured physiological signals
An evaluation method that includes: recording the values of a physiological signal during a certain measuring period; dividing the obtained time series of signal values into individual segments;...
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6721592 |
Automatic electrogram measurement
Techniques for monitoring the magnitudes of representative filtered EGM signals over time. In a typical implementation, a group of digital peak values is generated in a time period and a...
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6625484 |
Signal evaluation method for detecting QRS complexes in electrocardiogram signals
A signal evaluation method for detecting QRS complexes in electrocardiogram signals incorporates the following process steps: sampling of the signal ( 4 ) and conversion to discrete signal values...
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6608562 |
Vital signal detecting apparatus
A vital signal detecting apparatus comprises an attachable device to be attached to a finger, a sensor having a light-emitting device and a light-receiving device, and a transmitting circuit for...
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6594520 |
Apparatus for processing physiological signals
An apparatus for processing physiological signals, which includes a signal pick-up unit for picking up physiological measurement signals, in particular for picking up electrical signals of a heart,...
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6584344 |
Method and apparatus for measuring heart rate
An arrangement for detecting a heart beat and calculating heart rate on the basis of the detected heart beats, comprising means for measuring an EKG signal from a person's hands, a computer for...
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6532382 |
Method for calculating the heart rate variability for being applied in an ECG monitor, and ECG monitor comprising an appropriate calculation program
A method of calculating the heart rate variability of the human heart to be used in an ECG monitor comprises the following procedural steps: scanning of the ECG signal received from the ECG...
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6447458 |
Method and system of color coding components of central venous and pulmonary artery wedge pressure waveforms
A method and system for identifying components of a waveform. The system includes an ECG acquisition module, a pressure waveform acquisition module to acquire a pressure waveform, and an analysis...
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6438411 |
Digital ECG detection system
An R-wave detection system includes an electrode for placement in close proximity to or in contact with a heart to sense electrical activity of the heart. A signal processor is in communication...
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6416473 |
Methods and apparatus for providing an indicator of autonomic nervous system function
Methods and apparatus for providing a single, accurate indicator of a patient's autonomic nervous system function are described. The indicator is a combination of results of a plurality of...
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6397100 |
Axis shift analysis of electrocardiogram signal parameters especially applicable for multivector analysis by implantable medical devices, and use of same
We show how to determine whether there has been an axis shift in an electrocardiogram waveform and how to use this for filtering out bad electrocardiogram information and to modify an adaptive...
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6377844 |
R-wave detector circuit for sensing cardiac signals
Method and apparatus for measuring the heart rate in a human body. A first and second derivative of an electrical signal from the heart known as the QRS complex or R-wave is measured, and the...
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6370423 |
Method for analysis of biological voltage signals
Method of analyzing biological signals representative of voltage changes, including obtaining an analog biological signal representative of voltage changes, using digital processing software to...
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6345201 |
System and method for ventricular capture using far-field evoked response
An implantable pacemaker delivers a stimulation pulse in the ventricular chamber of patient's heart and automatically verifies ventricular capture. A control system of the pacemaker sets a...
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6266553 |
Spiral scanning computed tomography apparatus, and method for operating same, for cardiac imaging
In a computed tomography apparatus, and a method for operating same, for obtaining cardiac images, a spiral scan of a measurement volume containing a patient's heart is conducted, the production of...
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6236882 |
Noise rejection for monitoring ECG's
An implantable medical device which preferably has a segmented looping memory for storing triggered physiologic events also has autotriggers to record the ECGs and any other relevant physiologic...
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6152883 |
KLT-based quality controlled compression of a single lead egg
A compression algorithm for the compression of ECG recordings uses the Karhunen-Loeve Transform (KLT) to transform a set of N sampled ECG beats from a matrix of N×M samples into a new form, from...
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6115630 |
Determination of orientation of electrocardiogram signal in implantable medical devices
As particularly useful for implantable medical devices we teach a method and apparatus for orienting electrocardiogram input from electrodes of unknown vector orientation. This can be used for...
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6104947 |
Method and apparatus for determining exertion levels in fitness or athletic training and for determining the stress caused by training
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6070097 |
Method for generating a gating signal for cardiac MRI
An MRI system includes a detector system which receives an ECG signal from a patient being scanned and produces a gating signal. The gating signal is produced when a detected peak in the ECG signal...
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6041250 |
Adaptive line noise canceler and detector for ECG signals
An adaptive line noise detection and cancellation system having a baseline wander filter, high and low pass filters, an adaptive line noise canceler and various noise detectors is provided to...
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6032069 |
Physiological triggering device for high-field magnetic-resonance instrumentation
Refractory delay circuitry ensures that induced currents do not falsely rigger the acquisition phase of magnetic-resonance instrumentation. Immediately after the triggering of the acquisition...
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6026320 |
Heart rate variability as an indicator of exercise capacity
Based upon patient studies indices a high degree of correlation was found between HRV and VO2 max , i.e., the patient's exercise capacity. Based on this finding, a pacing therapy optimization...
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5967981 |
Time series prediction for event triggering
Delays in event detection in time-varying data can be reduced by predicting the time-varying data and then detecting the event in the predicted data. This finds application in the triggering of...
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5957857 |
Apparatus and method for automatic sensing threshold determination in cardiac pacemakers
An automatic sensing system for an implantable cardiac rhythm management device comprises a variable gain amplifier and associated filters where the gain of the amplifier is adjusted as a function...
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5947909 |
Neural network polymorphic QRS detector
A large universe of signals can be rapidly examined for a specific phenomenon by searching for a morphology representative of a subgroup of the universe. A detector for each such representative...
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5891048 |
Signal detector
A signal detector for detecting a biosignal with approximately known morpogy in a complex input signal (ECG), in particular for the detection of QRS complexes in an electrocardiogram. The detector...
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