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| Number | Title | Issue Date |
| 8180441 | System and method for distinguishing among cardiac ischemia, hypoglycemia and hyperglycemia using an implantable medical device Techniques are described for detecting ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. Ischemia is detected based on a shortening of the interval between the QRS complex and the end of a T-wave (QTmax), alone or in combinati... | 05/15/2012 |
| 8175695 | T-wave alternans train spotter A method and system for detecting T-wave alternans for use in an implanted medical device uses wave transformation of QT intervals to obtain a reliable measure of TWA. In one embodiment, an array provides alternating sign multiplication factors which are applied res... | 05/08/2012 |
| 8160686 | Methods and devices for accurately classifying cardiac activity Methods, systems, and devices for signal analysis in an implanted cardiac monitoring and treatment device such as an implantable cardioverter defibrillator. In illustrative examples, captured data including detected events is analyzed to identify likely overdetectio... | 04/17/2012 |
| 8160687 | Methods and devices for accurately classifying cardiac activity Methods, systems, and devices for signal analysis in an implanted cardiac monitoring and treatment device such as an implantable cardioverter defibrillator. In some examples, captured data including detected events is analyzed to identify likely overdetection of car... | 04/17/2012 |
| 8116859 | Electrocardiologic device for the assisted diagnosis of brugada syndrome or early repolarization syndrome Electrocardiologic device for assisted diagnosis, preferably for the diagnosis of Brugada syndrome or Early Repolarization syndrome. This device allows characterizing the ventricular repolarization wave of an ECG signal collected from a patient. Extracting out of th... | 02/14/2012 |
| 8112149 | System and method for heart and activity monitoring A system and method determining physiological status of a patient. A determination is made whether the patient is sleeping. The amplitude and change in voltage over time of any intramyocardial electrogram is measured for a right ventricle and a left ventricle of a h... | 02/07/2012 |
| 8055333 | Device and method for detecting cardiac impairments Electrocardiogram (ECG) recorded signals are processed by a computer-implemented method to substantially remove extraneous signals to produce intermediary signals, and to separate the intermediary signals using a non-orthogonal transformation method such as independ... | 11/08/2011 |
| 8041417 | Method and system for dynamical systems modeling of electrocardiogram data Electrocardiogram data is received in association with a subject, the electrocardiogram data comprising a series of RR intervals and a series of QT intervals. A first value which indicates an amount by which uncertainty associated with the QT intervals is reduced gi... | 10/18/2011 |
| 8019410 | System and method for detecting hypoglycemia using an implantable medical device based on pre-symptomatic physiological responses An intracardiac electrogram (IEGM) or other suitable electrical cardiac signal is sensed. Values representative of a pre-symptomatic physiologic response to a hypoglycemic event are derived from the cardiac signal. Then, hypoglycemia is detected based on the values ... | 09/13/2011 |
| 8000781 | Method of evaluating effect of prolonging QT interval in electrocardiogram A method for evaluating electrocardiogram QT interval-prolonging action of a test substance, which comprises preparing a hamster anesthetized under such a condition that end of T wave is definitely observed on an electrocardiogram, and comparing electrocardiogram QT... | 08/16/2011 |
| 7991459 | Method for defining signal templates in implantable cardiac devices Template formation methods for use in implantable cardiac rhythm management devices. In an illustrative method, a signal is captured in an implanted cardiac rhythm management device, and parameters for analysis of the captured signal are then defined. Then, in the e... | 08/02/2011 |
| 7991458 | System and a method for analysing ECG curvature for long QT syndrome and drug influence The present invention relates to a system or method for analyzing drug influence on ECG curvature and Long QT Syndrome. The system has an input means connected to an ECG source, where different parameters of a received ECG curvature are indicated and/or isolated for... | 08/02/2011 |
| 7899523 | Frequency processing of an RR series in an analogue cardiac signal The RR series, comprising a number of samples respectively defining the time interval between two successive heartbeats, is filtered by means of a digital band-pass filter (Fk), having a given band-pass [fc; f′c] and preferably by means of a recursive e... | 03/01/2011 |
| 7725172 | T-wave alternans train spotter A method and system for detecting T-wave alternans for use in an implanted medical device uses wave transformation of QT intervals to obtain a reliable measure of TWA. In one embodiment, an array provides alternating sign multiplication factors which are applied res... | 05/25/2010 |
| 7702383 | Methodology for automated signal morphology analysis in implantable electrotherapy and diagnostic systems Systems and related methods for analyzing data sensed from a device implanted in a patient, such as a cardiac pacing system. The system detects and evaluates electric signals within the patient that share a common event marker. By using algorithms and graphical pres... | 04/20/2010 |
| 7627369 | QT-interval measurement in the electrocardiogram A method and apparatus for measuring the QT interval of an electrocardiogram (ECG) signal is provided wherein the end of the T wave is identified from ECG data. The end of the T wave is defined as the first time of intersection at which an upright T wave of a first ... | 12/01/2009 |
| 7502644 | System and method for distinguishing among cardiac ischemia, hypoglycemia and hyperglycemia using an implantable medical device Techniques are described for detecting ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. Ischemia is detected based on a shortening of the interval between the QRS complex and the end of a T-wave (QTmax), alone or in combinati... | 03/10/2009 |
| 7400920 | Detection of renal failure by cardiac implantable medical device Morphological features within electrical cardiac signals are tracked and changes in features are monitored to detect renal failure. The morphological feature may be an interval between corresponding polarization events such as the interval between QRS-complexes and ... | 07/15/2008 |
| 7376458 | Method for defining signal templates in implantable cardiac devices Template formation methods for use in implantable cardiac rhythm management devices. In an illustrative method, a signal is captured signal an implanted cardiac rhythm management device, and parameters for analysis of the captured signal are then defined. Then, in t... | 05/20/2008 |
| 7367941 | Detection and characterization of cholinergic oscillatory control in peripheral microvasculature The present invention is an apparatus and method for assessing the condition of a subject by measuring and characterizing one or more oscillatory activities of the subject. The oscillatory activities are under the control of the autonomic nervous system and characte... | 05/06/2008 |
| 7366568 | Controlled delivery of intermittent stress augmentation pacing for cardioprotective effect A device and method for delivering electrical stimulation to the heart in a manner which provides a protective effect against subsequent ischemia is disclosed. The protective effect is produced by configuring a cardiac pacing device to intermittently switch from a n... | 04/29/2008 |
| 7361146 | System and method for detecting abnormal respiration via respiratory parameters derived from intracardiac electrogram signals Techniques are provided for tracking patient respiration based upon intracardiac electrogram (IEGM) signals or other electrical cardiac signals. Briefly, respiration patterns are detected based upon cycle-to-cycle changes in morphological features associated with in... | 04/22/2008 |
| 7358854 | Method and device to identify a periodic light source In a device for location positioning, and more particularly, in a system for identifying an environmental source emitting a base frequency and waveform signal, a sensor (101) records an environmental source (105) emitting a base frequency and waveform ... | 04/15/2008 |
| 7338410 | Systems and methods for breathing exercise regimens to promote ischemic preconditioning Systems and methods for promoting ischemic preconditioning in individuals are provided. Ischemic preconditioning is provided by exercise treatments. The exercise treatments consist of breathing exercise regimens with breathing sequences of oxygenating and non-oxygen... | 03/04/2008 |
| 7330752 | Procedure for detection of stress by segmentation and analyzing a heart beat signal A procedure for the detection of stress state is disclosed, wherein ambulatory heart beat signal is measured. In the first phase segments are defined from heart beat signal with a chosen rule for segmentation. Then at least one segment describing a physiological sta... | 02/12/2008 |
| 7328066 | Implantable cardiac stimulation device, system and method that identifies and prevents impending arrhythmias of the atria An implantable cardiac stimulation device includes a system that identifies and prevents the occurrence of impending atrial arrhythmias. A sensing circuit senses atrial activity of a patient's heart to provide an atrial activity signal. A processor compares the atri... | 02/05/2008 |
| 7313439 | Method and apparatus for predicting arrhythmias using diurnal heart rate A method of predicting an arrhythmia, such as ventricular tachycardia, for example, in a medical device using a quantitative measure in order to allow assessment of patient risk and to enable preventative interventions by the device and clinicians. The trending of d... | 12/25/2007 |
| 7313437 | Adaptive diastolic interval control of action potential duration alternans A real-time detection technique and a real-time, adaptive, model-independent control technique for detecting and stabilizing pathological physiological rhythms, such as repolarization alternans, on the basis of the rate dependence of excitable tissue such as cardiac... | 12/25/2007 |
| 7310551 | Diagnostic gauge for cardiac health analysis A diagnostic gauge for cardiac health is described. Multiple parameters pertaining to a patent's cardiac health are distilled to a single diagnostic vector having an angle and a magnitude. The diagnostic vector is plotted on a Cartesian graph to form a visual gauge ... | 12/18/2007 |
| 7295874 | Intermittent stress augmentation pacing for cardioprotective effect A device and method for delivering electrical stimulation to the heart in a manner which provides a protective effect against subsequent ischemia is disclosed. The protective effect is produced by configuring a cardiac pacing device to intermittently switch from a n... | 11/13/2007 |
| 7289845 | Curvature based method for selecting features from an electrophysiologic signal for purpose of complex identification and classification A method for curvature based complex identification and classification comprises sensing a cardiac signal and computing curvatures at sample points on the sensed cardiac signal. Then to extract features from the computed curvatures, and compare the extracted feature... | 10/30/2007 |
| 7283864 | Method and apparatus for identifying patients with wide QRS complexes A medical device programmer or other external system capable of programming an implantable CRM device includes a wide-QRS detection and alerting system. Upon detection of a wide QRS complex, a wide-QRS indicator produces a visual indication of the detection using on... | 10/16/2007 |
| 7280869 | Arrhythmia termination detection based on beat pattern In general, the invention is directed to an apparatus and method for determining whether an identified atrial tachyarrhythmia episode has terminated. The invention enables determination of whether the tachyarrhythmia episode has terminated based on cardiac beat patt... | 10/09/2007 |
| 7272436 | System and method for distinguishing among cardiac ischemia, hypoglycemia and hyperglycemia using an implantable medical device Techniques are described for detecting ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. Ischemia is detected based on a shortening of the interval between the QRS complex and the end of a T-wave (QTmax), alone or in combinati... | 09/18/2007 |
| 7272435 | System and method for sudden cardiac death prediction A device that calculates a sudden cardiac death score based on acquired patient data. A system and method that combines independent indications of sudden cardiac death to predict sudden cardiac death. The system can include various cardiology test systems interconne... | 09/18/2007 |
| 7272428 | Wireless electrocardiograph system and method A method and system for wireless ECG monitoring is provided. An electrode connector, transmitter and receiver operate with existing electrodes and ECG monitors. The electrode connector includes connectors for attaching to disposable or reusable single electrodes. Th... | 09/18/2007 |
| 7257443 | Method and apparatus for detecting oscillations in cardiac rhythm with electrogram signals A cardiac rhythm management device is configured to detect oscillations in cardiac rhythm by comparing electrogram signals during successive heart beats. Upon detection of electrical alternans, the device may adjust its operating behavior to compensate for the delet... | 08/14/2007 |
| 7254440 | Implantable ischemia and myocardial infarction monitor and method An implantable ischemia detecting devices generates a plurality of electrograms for analysis. A processor integrates the ST segment and T wave of each electrogram and normalizes the resulting integral by a normalizing factor to provide a ST segment score and T wave ... | 08/07/2007 |
| 7248919 | Cardiac rhythm management system using time-domain heart rate variability indicia A cardiac rhythm management system that provides an indication of patient well-being based on the autonomic balance between the sympathetic and parasympathetic/vagal components of the autonomic nervous system, using time-domain processing of frequency components of ... | 07/24/2007 |
| 7245786 | Filtering artifact from fMRI data using the stockwell transform The present invention relates to a method for filtering time-varying MR signal data prior to image reconstruction. A one-dimensional FT is applied to the time-varying MR signal data along each frequency-encode line of k space. The phase p of each complex pair (R, I)... | 07/17/2007 |
