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7596405 |
Atrial fibrillation detection
Atrial fibrillation is detected in an electrical signal representative of a beating heart by measuring atrial activity over a time window of three or more beats, measuring beat interval variation...
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7593772 |
Methods and devices to characterize the probability of successful defibrillation and determine treatments for ventricular fibrillation
A computationally efficient method of determining the duration of ventricular fibrillation and the probability of successful defibrillation by analyzing an electrocardiogram using the logarithm of...
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7593766 |
Detector for atrial flutter and atrial fibrillation
A detector for atrial fibrillation and/or atrial flutter comprises an atrial input for receiving an atrial signal representing an intraatrial electrogram or a time course of an intraatrial...
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7580741 |
Method and device for determination of arrhythmia rate zone thresholds using a probability function
A probability function for heart rate is determined using collected and measured heart rate values. One or more heart rate probability values are selected. Thresholds for arrhythmia rate zones are...
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7580740 |
Atrial tachyarrhythmia detection using selected atrial intervals
Methods and systems are directed to detecting atrial tachyarrhythmia. A plurality of A-A intervals is detected. The detected A-A intervals are selected and used to detect atrial tachyarrhythmia....
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7570990 |
Detector for atrial fibrillation and flutter
Atrial fibrillation or flutter detector having impedance unit, with measurement input, connected to atrial electrode line having electrode for unipolar measurement of atrium impedance and...
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7542956 |
Autonomic computing method and apparatus
The disparate data and commands from are received from a managed resource ( 102 ) and have potentially different semantics. The disparate data and commands are processed according to rules received...
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7539536 |
Cardiac rhythm management systems and methods using multiple morphology templates for discriminating between rhythms
This document describes systems, devices, and methods that use multiple morphology templates for discriminating between rhythms, such as supraventricular tachyarrhythmias (SVTs) and ventricular...
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7515956 |
Template based AV/VA interval comparison for the discrimination of cardiac arrhythmias
An implantable cardioverter/defibrillator includes a tachycardia detection system that detects one-to-one (1:1) tachycardia, which is a tachycardia with a one-to-one relationship between atrial and...
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7480529 |
Method and apparatus for cardiac arrhythmia classification using sample entropy
An implantable medical device includes an arrhythmia detection and classification system that classifies an arrhythmia episode based on an irregularity parameter and/or a complexity parameter. The...
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7477935 |
Method and apparatus for beat alignment and comparison
Methods of using a template having a template data set and template parameters to provide improved alignment of captured cardiac signal data to a stored template. More particularly, in an...
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7474916 |
Method and apparatus for discriminating ventricular and supraventricular tachyarrhythmias
A system and method are provided for discriminating supra-ventricular tachycardia (SVT) from ventricular tachycardia (VT). A monitoring EGM signal is acquired during a sensing window timed...
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7444179 |
Devices, systems and methods for characterization of ventricular fibrillation and for treatment of ventricular fibrillation
A method of determining a state of ventricular fibrillation, includes: measuring the rhythm of the heart during ventricular fibrillation for a period of time; creating a lagged phase space...
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7443303 |
System and method for managing workflow
A system and method for managing workflow is provided. The system includes one or more computer devices which execute workflow software to assign tasks to medical staff. The workflow software may...
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7440799 |
Therapy-selection methods for implantable heart monitors
Miniature heart-monitoring devices, such as defibrillators and cardioverters, are implanted in humans to detect and correct abnormal heart rhythms Microprocessors and stored instructions, or...
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7430446 |
Methods and apparatuses for cardiac arrhythmia classification using morphology stability
An implantable cardioverter/defibrillator (ICD) includes a tachyarrhythmia detection and classification system that classifies tachyarrhythmias based on a morphological analysis of arrhythmic...
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7421292 |
System and method for controlling the recording of diagnostic medical data in an implantable medical device
Techniques are provided for controlling the recording of diagnostic data, such as intracardiac electrogram (IEGM) data, so as to reduce device power consumption. In one technique, the risk of onset...
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7418295 |
Method and system for identifying and displaying groups of cardiac arrhythmic episodes
A medical device system that receives cardiac data representing a plurality of stored arrhythmic episodes, and analyzing the cardiac data to identify and display a subset of stored arrhythmic...
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7353057 |
Apparatus and method for detecting atrial fibrillation
A lightweight, battery-operated, voltage-stabilized, bioelectronic and non-invasive measuring apparatus derives the electrical heart potentials using measuring electrodes fixed to the patient and...
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7346388 |
Method and apparatus for rate accuracy enhancement in ventricular tachycardia detection
An implantable cardioverter/defibrillator (ICD) executes a rate accuracy enhancement algorithm to select measured atrial and ventricular intervals for classifying a detected tachycardia based on...
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7328063 |
Method and apparatus for arrhythmia classification using atrial signal mapping
An implantable medical device senses a plurality of electrograms from substantially different atrial locations, detects regional depolarizations from the electrograms, and analyzes timing...
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7302291 |
System and method for analyzing a patient status for atrial fibrillation for use in automated patient care
An automated system and method for diagnosing and monitoring the outcomes of atrial fibrillation is described. A plurality of monitoring sets is retrieved from a database. Each of the monitoring...
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7283865 |
Device and method for determining a cardiac condition using a complex signal formed from a detected cardiac signal
In a device and a method for determining a cardiac condition from a detected cardiac signal, an input signal is formed from the detected cardiac signal and supplied to an analysis unit. The...
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7277747 |
Arrhythmia memory for tachyarrhythmia discrimination
This document discusses, among other things, a method of identifying a non-fatal tachyarrhythmia episode by determining a degree of similarity between the episode and a template generated from a...
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7272438 |
Mode switching heart stimulation apparatus and method
In a heart stimulation device a mode of operation is switched in response to detection of atrial tachyarrhythmia such as atrial fibrillation. The stimulation device may initially operate in a...
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7269454 |
Methods and devices to guide therapy for ventricular fibrillation based on waveform analysis and survival benefit analysis
A method of determining a state of ventricular fibrillation from a waveform, includes: performing calculations on the Fourier transform of the waveform voltage values by using the quotient of the...
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7266409 |
Method and apparatus for determining oversensing in a medical device
A method and apparatus for determining oversensing in an implantable medical device that includes sensing a first cardiac signal and detecting cardiac events via a first electrode configuration,...
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7242978 |
Method and apparatus for generating a template for arrhythmia detection and electrogram morphology classification
An implantable medical device and associated method for automatically generating morphology templates during fast cardiac rhythms, confirming a provisional template as a confirmed template, and...
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7236819 |
Separation of a subcutaneous cardiac signal from a plurality of composite signals
A cardiac monitoring and/or stimulation method and systems provide monitoring, defibrillation and/or pacing therapies, including systems detecting and/or treating cardiac arrhythmia. A system...
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7233822 |
Combination of electrogram and intra-cardiac pressure to discriminate between fibrillation and tachycardia
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...
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7228173 |
Cardiac tachyarrhythmia therapy selection based on patient response information
Cardiac treatment methods and devices providing templates representative of past tachyarrythmia events, each template associated with a therapy. A cardiac waveform is detected, and if it...
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7212850 |
System and method for processing and presenting arrhythmia information to facilitate heart arrhythmia identification and treatment
A system and method for presenting information relating to heart data can involve operations including identifying arrhythmia events in physiological data obtained for a living being, receiving...
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7212849 |
Methods and apparatuses for arrhythmia detection and classification using wireless ECG
A CRM system enhances intracardiac electrogram-based arrhythmia detection using a wireless electrocardiogram (ECG), which is a signal sensed with implantable electrodes and approximating a surface...
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7203535 |
System and method for classifying tachycardia arrhythmias having 1:1 atrial-to-ventricular rhythms
An implantable cardioverter/defibrillator includes a tachycardia detection system that detects one-to-one (1:1) tachycardia, which is a tachycardia with a one-to-one relationship between atrial and...
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7194300 |
Cardiac monitoring
Systems and techniques for monitoring cardiac activity. In one aspect, a method includes collecting information describing the variability in heart rate over a series of beats, designating...
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7184815 |
System and method for selection of morphology templates
A template selection method involves providing a plurality of templates representing a type of cardiac event. One or more characteristics of each template are evaluated. The evaluations are...
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7181277 |
Methods and systems for reducing the likelihood of arrhythmia onset
Various embodiments are directed to providing systems and methods that can reduce the likelihood of arrhythmia onset by effecting a treatment, responsive to a detected premature event, that mimics...
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7181270 |
Arrangement for predicting tachyarrhythmia
An arrangement 10 for predicting tachyarrhythmia of a heart has a detection means 12 and an evaluation unit 18 . The detection means 12 picks up electrical signals from the heart. The...
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7177685 |
Classifying tachyarrhythmia using time interval between ventricular depolarization and mitral valve closure
A cardiac rhythm management system measures a time interval between a first fiducial marker indicative of a ventricular depolarization (e.g., a Q-wave, an R-wave, etc.) and a second fiducial marker...
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7177682 |
Highly specific technique for discriminating atrial fibrillation from atrial flutter
A cardiac rhythm management system including a highly sensitive technique for discriminating AF from AFL. An electrode disposed in or about a heart senses a cardiac signal. A controller through a...
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7174209 |
Algorithm for discrimination of 1:1 tachycardias
An algorithm for detection of tachycardias and for discriminating between supraventricular tachycardia (SVT) and ventricular tachycardia (VT) when a 1:1 tachycardia condition is present that can be...
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7171260 |
Ectopic beat detection algorithm for implantable cardiac rhythm management device
A method implemented in a dual chamber cardiac rhythm management device for identifying non-sinus ventricular depolarizations following an atrial event. The PR interval for a sensed ventricular...
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7167747 |
Identification of oversensing using sinus R-wave template
A method and apparatus delivering therapy in an implantable medical device that includes sensing a first cardiac signal and detecting cardiac events via a first electrode configuration, determining...
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7151958 |
System and method of classifying tachyarrhythmia episodes as associated or disassociated
A method and system for classifying tachyarrhythmia episodes as associated or disassociated. Primary and auxiliary depolarizations are detected from different cardiac regions during a tachycardia...
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7149577 |
Apparatus and method using ATP return cycle length for arrhythmia discrimination
An apparatus for discriminating between cardiac events that includes an input circuit receiving signals indicative of the cardiac events, a first output circuit generating pulses in response to the...
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7146214 |
Anti-tachycardia pacing based on multi-site electrograms
In one embodiment, a method includes sensing depolarizations of a heart at a plurality of different locations, and determining a sequence of the sensed depolarizations. The method may further...
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7142912 |
Method and apparatus for assessing and treating atrial fibrillation risk
A method and apparatus for assessing the risk of atrial fibrillation in a patient by calculating the relative frequency of short and long intervals between successive heart beats during sinus...
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7142911 |
Method and apparatus for monitoring drug effects on cardiac electrical signals using an implantable cardiac stimulation device
An implantable cardiac stimulation device, such as a pacemaker or Implantable Cardioverter Defibrillator, is configured to automatically monitor the effects of antiarrhythmic drugs on cardiac...
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7139607 |
Arrhythmia discrimination
Various exemplary methods include altering conduction and/or operation of the AV node and/or AV bundle to help classify arrhythmias.
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7123954 |
Method for classifying and localizing heart arrhythmias
Analyzes surface electrocardiographic and intracardiac signals to identify and separate electrical activity corresponding to distinct but superimposed events in the heart. Assesses the spatial...
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