公开(公告)号：US10555684B2

公开(公告)日：2020-02-11

申请号：US15496309

申请日：2017-04-25

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Jian Cao ,  Yuanzhen Liu

IPC: A61B5/0464 ,  A61B5/0456 ,  A61N1/39 ,  A61B5/04 ,  A61N1/08 ,  A61N1/365 ,  A61N1/05 ,  A61N1/02 ,  A61N1/37

Abstract: An implantable cardioverter defibrillator (ICD) performs a method that includes determining whether first criteria for detecting a ventricular tachyarrhythmia are met by a cardiac electrical signal. The ICD determines features from cardiac signal segment of a group of cardiac signal segments and determines whether a first portion of the features satisfy monomorphic waveform criteria and determines whether a second portion of the features satisfy supraventricular beat criteria. The ICD determines whether second criteria for detecting the ventricular tachyarrhythmia are met and withholds detecting of the ventricular tachyarrhythmia in response to the monomorphic waveform criteria and the supraventricular beat criteria being met.

公开(公告)号：US20210251551A1

公开(公告)日：2021-08-19

申请号：US17172770

申请日：2021-02-10

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Saul E. Greenhut ,  Yuanzhen Liu

IPC: A61B5/363 ,  A61B5/00 ,  A61B5/29

Abstract: A medical device is configured to sense an electrical signal and determine that signal to noise criteria are met based on electrical signal segments stored in response to sensed electrophysiological events. The medical device is configured to determine an increased gain signal segment from one of the stored electrical signal segments in response to determining that the signal to noise criteria are met. The medical device determines a noise metric from the increased gain signal segment. The stored electrical signal segment associated with the increased gain signal segment may be classified as a noise segment in response to the noise metric meeting noise detection criteria.

公开(公告)号：US20210138243A1

公开(公告)日：2021-05-13

申请号：US17087960

申请日：2020-11-03

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Kevin L. Dehmer ,  Saul Greenhut ,  Troy E. Jackson ,  Yuanzhen Liu

IPC: A61N1/362 ,  A61B5/0464

Abstract: A medical device is configured to determine time intervals between consecutive cardiac events sensed from a cardiac electrical signal, increase a value of a tachyarrhythmia interval count in response to each of the determine time intervals detected as a tachyarrhythmia interval. The device is further configured to detect normal sinus rhythm events and the decrease the value of the tachyarrhythmia interval count in response to a threshold number of detected normal sinus rhythm events.