Method and apparatus for adjusting threshold during atrial arrhythmia detection in an implantable medical device
A technology for arrhythmia and medical equipment, applied in electrotherapy, treatment, application, etc., can solve the problems of false detection of atrial tachycardia, false detection of atrial fibrillation, etc.
Active Publication Date: 2020-09-08
MEDTRONIC INC
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Problems solved by technology
[0006] Occasionally, false detection of atrial fibrillation may occur in cardiac medical devices during ectopic rhythms running with irregular coupled intervals or basic sinus variability / sick sinus running
Additionally, false detection of atrial tachycardia can occur in cardiac medical devices during ectopic and regular normal sinus rhythm
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[0033] In the following description, reference is made to illustrative embodiments for performing the methods described herein. It is understood that other embodiments may be utilized without departing from the scope of the present disclosure.
[0034] The methods presented herein can be embodied in software, hardware or firmware in an implantable or external medical device. Such devices include implantable monitoring devices with cardiac EGM / ECG monitoring capabilities and associated EGM / ECG sensing electrodes, which may be intracardiac, epicardial, or subcutaneous.
[0035] The methods described herein can also be incorporated into implantable medical devices with therapy delivery capabilities, such as single or biventricular pacing systems or ICDs that sense R-waves in the ventricles and deliver electrical stimulation therapy to the ventricles . The presently disclosed atrial arrhythmia detection method can also be incorporated into an external monitor (e.g., a Holter mon...
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An implantable medical device and method for determining an atrial arrhythmia event, comprising: a cardiac sensing device including a housing having circuitry positioned therein; a plurality of electrodes, the plurality of electrodes electrically coupled to the circuitry for sensing cardiac signals; and a processor configured to generate an initial detection of an atrial arrhythmia event in response to an atrial arrhythmia threshold, determining whether a P wave occurs during the initial detection, an adaptive threshold is determined in response to detecting the P wave, the atrial arrhythmia threshold is adjusted in response to the adaptive threshold, and the adjusted atrial arrhythmia threshold is used Arrhythmia thresholds are used to generate subsequent initial detections of atrial arrhythmia events.
Description
technical field [0001] The present disclosure relates generally to implantable medical devices, and in particular to a method and apparatus for adjusting a detection threshold for detecting atrial arrhythmias in an implantable medical device. Background technique [0002] During normal sinus rhythm (NSR), the heartbeat is regulated by electrical signals generated by the sinoatrial (SA) node located in the wall of the right atrium. Each atrial depolarization signal generated by the SA node spreads over the atria (causing depolarization and contraction of the atria) and reaches the atrioventricular (A-V) node. The A-V node responds by propagating ventricular depolarizing signals through the His bundle of the ventricular septum and subsequently to the bundle branches and Purkinje muscle fibers of the right and left ventricles. [0003] Atrial tachyarrhythmias include unorganized forms of atrial fibrillation and various degrees of organized atrial tachycardia, including atrial ...
Claims
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IPC IPC(8): A61B5/0452A61B5/0456A61B5/046A61B5/0464A61N1/362A61N1/365A61N1/39A61B5/361A61B5/352A61B5/363
CPCA61N1/3624A61N1/36507A61N1/36592A61N1/395A61B5/686A61N1/3987A61B5/316A61B5/24A61B5/361A61B5/363A61B5/352A61B5/349
Inventor S·萨卡D·L·汉森G·A·奈特泽尔J·D·瑞兰德R·维斯辛斯基
Owner MEDTRONIC INC