Patent•
Discrimination of supraventricular tachycardia and ventricular tachycardia events
01 Aug 2011-
TL;DR: In this article, a numerical convolution is performed using the NSR template and feature points for each sensed NSR to give a NSR filter output, where a plurality of NSR complexes are used to determine a median filter output template.
Abstract: A method and system for discrimination of supraventricular tachycardia and ventricular tachycardia events. Morphological features points are extracted from normal sinus rhythm (NSR) complexes and used to generate a NSR template. A numerical convolution is performed using the NSR template and the feature points for each sensed NSR to give a NSR filter output. Using a plurality of NSR complexes, a median NSR filter output template is determined, where the median NSR filter output template has a median value for each value in the NSR filter output. The median NSR filter output template is then used during a tachycardia event to distinguish tachycardia events as either ventricular tachycardia events or supraventricular tachycardia events.
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Patent•
29 Aug 2012
TL;DR: In this paper, an adherent device to monitor a patient for an extended period comprises a breathable tape, a porous material with an adhesive coating to adhere the tape to a skin of the patient.
Abstract: An adherent device to monitor a patient for an extended period comprises a breathable tape. The breathable tape comprises a porous material with an adhesive coating to adhere the breathable tape to a skin of the patient. At least one electrode is affixed to the breathable tape and capable of electrically coupling to a skin of the patient. A printed circuit board is connected to the breathable tape to support the printed circuit board with the breathable tape when the tape is adhered to the patient. Electronic components electrically are connected to the printed circuit board and coupled to the at least one electrode to measure physiologic signals of the patient. A breathable cover and/or an electronics housing is disposed over the circuit board and electronic components and connected to at least one of the electronics components, the printed circuit board or the breathable tape.
425 citations
Patent•
17 Dec 2003TL;DR: In this paper, a repeater device for an advanced patient management system communicates with a medical device coupled to a patient to obtain data about the medical device and/or patient's condition.
Abstract: A repeater device for an advanced patient management system communicates with a medical device coupled to a patient to obtain data about the medical device and/or patient's condition. The repeater device maintains the data while if considers various factors when coordinating transfer of the data to a repository of the advanced patient management system. The repeater device may be configured to analyze the data to determine a degree of urgency, such as whether an emergency exists, and then determine when to transfer the data based on the degree of urgency. The repeater device may also be configured to test the condition of the communication medium being used to transfer the data to the repository, such as determining whether a telephone line is in use, and then determine when to transfer the data based on the condition of the of the communication medium.
344 citations
Patent•
05 Nov 2001TL;DR: In this paper, a cutaneous electrode system is placed and used to observe cardiac signal sensing and/or simulate cardiac stimulation, and implanted electrodes are placed to correspond to cutaneously identified locations.
Abstract: Methods and devices for cutaneous testing of a patient for the purpose of implanting and/or placing electrodes for electrical cardiac stimulation. In an example, a cutaneous electrode system is placed and used to observe cardiac signal sensing and/or simulate cardiac stimulation. The method may include identifying locations for improved sensing or simulation, and implanting a device or system such that implanted electrodes are placed to correspond to cutaneously identified locations.
252 citations
Patent•
12 Sep 2008
TL;DR: In this article, a heart failure patient management system includes a detecting system and an adherent device, which includes a plurality of sensors to monitor physiological parameters of the patient to determine heart failure status.
Abstract: A heart failure patient management system includes a detecting system. The detecting system includes an adherent device configured to be coupled to a patient. The adherent device includes a plurality of sensors to monitor physiological parameters of the patient to determine heart failure status. At least one ID may be coupled to the adherent device that is addressable and unique to each adherent device. A wireless communication device is coupled to the plurality of sensors and configured to transfer patient data directly or indirectly from the plurality of sensors to a remote monitoring system. The remote monitoring system is coupled to the wireless communication device. An energy management device may be coupled to the plurality of sensors
251 citations
Patent•
24 Aug 2009TL;DR: In this paper, a system and method for classifying cardiac complexes sensed during a tachycardia episode was proposed, where a first cardiac signal and a second cardiac signal are sensed, where the first signal has a voltage.
Abstract: A system and method for classifying cardiac complexes sensed during a tachycardia episode. A first cardiac signal and a second cardiac signal are sensed, where the first cardiac signal has a voltage. A first cardiac complex and a second cardiac complex of a cardiac cycle are detected in the first and second cardiac signal, respectively. A predetermined alignment feature is identified in the second cardiac complex. A datum is defined, or positioned, at a specified interval from the predetermined alignment feature of the second cardiac complex. Voltage values are then measured from the first cardiac complex at each of two or more measurement intervals from the datum. The voltage values are then compared voltage values measured from NSR cardiac complexes to classify the first cardiac complex is either a ventricular tachycardia complex or a supraventricular tachycardiac complex.
236 citations
References
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Patent•
28 Feb 2001
TL;DR: In this article, radio frequency energy is used to both temporarily stun tissue and to ablate tissue through a common electrode, which can be accomplished by tissue ablation or by the administration of medication.
Abstract: Systems and methods for diagnosing and treating tissue transmit an electrical energy pulse that temporarily stuns a zone of tissue, temporarily rendering it electrically unresponsive. The systems and methods sense an electrophysiological effect due to the transmitted pulse. The systems and methods alter an electrophysiological property of tissue in or near the zone based, at least in part, upon the sensed electrophysiological effect. The alteration of the electrophysiological property can be accomplished, for example, by tissue ablation or by the administration of medication. In a preferred implementation, radio frequency energy is used to both temporarily stun tissue and to ablate tissue through a common electrode.
1,098 citations
TL;DR: In this article, a 3D tracking and imaging system is used to carry out a medical procedure using a catheter, probe, sensor, pacemaker lead, needle, or the like, and the position of the surgical instrument is tracked as it moves through a medium in a bodily structure.
Abstract: A method for carrying out a medical procedure using a 3-D tracking and imaging system (1600). A surgical instrument, such as a catheter, probe, sensor, pacemaker lead, needle, or the like is inserted into a living being, and the position of the surgical instrument is tracked as it moves through a medium in a bodily structure. The location of the surgical instrument relative to its immediate surroundings is displayed to improve a physician's ability to precisely position the surgical instrument. The medical procedures including targeted drug delivery, sewing sutures, removal of an obstruction from the circulatory system, a biopsy, amniocentesis, brain surgery, measurement of cervical dilation, evaluation of knee stability, assessment of myocardial contractibility, eye surgery, prostate surgery, trans-myocardial revascularization (TMR), robotic surgery, and evaluation of RF transmissions.
959 citations
Patent•
26 Mar 1996TL;DR: An implantable antiarrhythmia device which detects and classifies arrhythmias of the human heart, and delivers appropriate therapy is described in this paper, where a set of prioritized rules, each of the rules defining a plurality of criteria based upon characteristics of sensed depolarizations of heart tissue, each rule being met when the criteria associated with the rule are met.
Abstract: An implantable antiarrhythmia device which detects and classifies arrhythmias of the human heart, and delivers appropriate therapy. The device employs a method of arrhythmia classification based on a set of prioritized rules, each of the rules defining a plurality of criteria based upon characteristics of sensed depolarizations of heart tissue, each rule being met when the criteria associated with the rule are met. Some rules, when met, trigger delivery of antiarrhythmia therapy. Other rules, when met, inhibit delivery of antiarrhythmia therapy. The rules may be met simultaneously, and if so, the highest priority rule governs the behavior of the device.
924 citations
Patent•
16 Dec 1993TL;DR: In this article, a method and apparatus for detecting and gathering electrical cardiac signals via an array of relatively closely spaced subcutaneous electrodes (located on the body of an implanted device) which may be employed with suitable switching circuits, signal processors, and memory to process the electrical signals between any selected pair or pairs of the electrode array in order to provide a leadless, orientation insensitive means for receiving the electrical signal from the heart.
Abstract: A method and apparatus for providing an enhanced capability of detecting and gathering electrical cardiac signals via an array of relatively closely spaced subcutaneous electrodes (located on the body of an implanted device) which may be employed with suitable switching circuits, signal processors, and memory to process the electrical cardiac signals between any selected pair or pairs of the electrode array in order to provide a leadless, orientation insensitive means for receiving the electrical signal from the heart. This far-field EGM may be used to provide storage and analysis of arrhythmic events and to provide control signals for the delivery of various therapies including pacing, cardioversion and defibrillation therapies as well as the delivery of antiarrhythmic drugs, and, in the pacing context, to effect capture detection and automatic stimulation threshold adaption, recording of PMT episodes, measurement of refractory periods in order to set timing windows for antitachy pacing therapies, and as a control signal for use in adjusting pacing rate to physiologic demand.
786 citations
Patent•
14 Jan 1993
TL;DR: In this paper, an implantable cardiac monitor is arranged for detecting both arrhythmias and ischemia of the human heart, which includes subcutaneous electrodes for establishing electrical contact with the heart and a sense amplifier coupled to each electrode for generating an electrocardiogram of a heart beat sensed at each of the electrodes.
Abstract: An implantable cardiac monitor is arranged for detecting both arrhythmias and ischemia of the human heart. The monitor includes subcutaneous electrodes for establishing electrical contact with the heart and a sense amplifier coupled to each electrode for generating an electrocardiogram of a heart beat sensed at each of the electrodes. The electrocardiograms are digitized and the digital samples thereof are stored in a memory. A microprocessor processes the digital samples of the electrocardiograms and generates characterizing data indicative of the physiology of the heart. The cardiac monitor includes telemetry to permit the cardiac data to be interrogated externally of the patient for obtaining the generated cardiac data indicative of arrhythmic and ischemic episodes.
681 citations