公开(公告)号：US20180028087A1

公开(公告)日：2018-02-01

申请号：US15606299

申请日：2017-05-26

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Jian CAO ,  Saul E. GREENHUT

IPC: A61B5/0464 ,  A61B5/021 ,  A61B5/04 ,  A61B5/00

CPC classification number: A61B5/0464 ,  A61B5/02108 ,  A61B5/0245 ,  A61B5/04011 ,  A61B5/04012 ,  A61B5/04017 ,  A61B5/0452 ,  A61B5/0456 ,  A61B5/4836 ,  A61B5/7203 ,  A61N1/3621 ,  A61N1/365 ,  A61N1/3702 ,  A61N1/3704 ,  A61N1/3925 ,  A61N1/3956 ,  A61N1/3962 ,  A61N1/3987 ,  H03H21/0012

Abstract: A medical device system, such as an extra-cardiovascular implantable cardioverter defibrillator ICD, senses R-waves from a first cardiac electrical signal by a first sensing channel and stores a time segment of a second cardiac electrical signal in response to each sensed R-wave. The medical device system determines a morphology parameter correlated to signal noise from time segments of the second cardiac electrical signal, detects a noisy signal segment based on the signal morphology parameter; and withholds detection of a tachyarrhythmia episode in response to detecting a threshold number of noisy signal segments.

公开(公告)号：US20180028083A1

公开(公告)日：2018-02-01

申请号：US15606216

申请日：2017-05-26

Applicant: Medtronic, Inc.

Inventor： Saul E. GREENHUT ,  Jian CAO ,  Xusheng ZHANG

IPC: A61B5/04 ,  A61B5/024 ,  A61N1/39 ,  A61B5/0464 ,  A61B5/0245

CPC classification number: A61B5/04017 ,  A61B5/02108 ,  A61B5/02405 ,  A61B5/0245 ,  A61B5/0422 ,  A61B5/0456 ,  A61B5/0464 ,  A61B5/686 ,  A61B5/7203 ,  A61B5/7217 ,  A61B5/7275 ,  A61N1/025 ,  A61N1/0504 ,  A61N1/36 ,  A61N1/36507 ,  A61N1/3704 ,  A61N1/3925 ,  A61N1/3956 ,  A61N1/3987

Abstract: A medical device, such as an extra-cardiovascular implantable cardioverter defibrillator (ICD), senses R-waves from a first cardiac electrical signal by a first sensing channel and stores a time segment of a second cardiac electrical signal acquired by a second sensing channel in response to each sensed R-wave. The medical device determines at least one noise parameter from a group of the stored time segments of the second cardiac electrical signal, detects noise based on the noise parameter, and withholds detection of a tachyarrhythmia episode in response to detecting the noise.

公开(公告)号：US20170281034A1

公开(公告)日：2017-10-05

申请号：US15084514

申请日：2016-03-30

Applicant: Medtronic, Inc.

Inventor： Elise J. HIGGINS ,  Mark L. BROWN ,  Jian CAO

IPC: A61B5/0464 ,  A61B5/042 ,  A61B5/046 ,  A61B5/00 ,  A61N1/39 ,  A61B5/04 ,  A61B5/0456

CPC classification number: A61B5/0464 ,  A61B5/0006 ,  A61B5/04012 ,  A61B5/0422 ,  A61B5/0456 ,  A61B5/046 ,  A61N1/3621 ,  A61N1/3925 ,  A61N1/3956 ,  A61N1/3987

Abstract: A medical device performs a method for detecting an atrial tachyarrhythmia by determining RR intervals between successive R-waves of a cardiac electrical signal and determining classification factors from the R-waves identified over a predetermined time period by determining at least a first classification factor correlated to variability of the RR intervals and a second classification factor indicating a presence of a ventricular tachyarrhythmia. The device classifies the cardiac electrical signal of the predetermined time period as unclassified, atrial tachyarrhythmia or non-atrial tachyarrhythmia by comparing the determined classification factors to classification criteria. The predetermined time period is classified as unclassified when the second classification factor indicates the presence of a ventricular tachyarrhythmia.

公开(公告)号：US20240315634A1

公开(公告)日：2024-09-26

申请号：US18735157

申请日：2024-06-05

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Jian CAO ,  Saul E. GREENHUT

IPC: A61B5/363 ,  A61B5/00 ,  A61B5/021 ,  A61B5/0245 ,  A61B5/316 ,  A61B5/341 ,  A61B5/349 ,  A61B5/352 ,  A61N1/362 ,  A61N1/365 ,  A61N1/37 ,  A61N1/39 ,  H03H21/00

CPC classification number: A61B5/363 ,  A61B5/02108 ,  A61B5/316 ,  A61B5/341 ,  A61B5/349 ,  A61B5/352 ,  A61B5/7203 ,  A61N1/3621 ,  A61N1/365 ,  A61N1/3702 ,  A61N1/3925 ,  A61B5/0245 ,  A61B5/4836 ,  A61N1/3704 ,  A61N1/3956 ,  A61N1/3962 ,  A61N1/3987 ,  H03H21/0012

Abstract: A medical device system, such as an extra-cardiovascular implantable cardioverter defibrillator ICD, senses R-waves from a first cardiac electrical signal by a first sensing channel and stores a time segment of a second cardiac electrical signal in response to each sensed R-wave. The medical device system determines a morphology parameter correlated to signal noise from time segments of the second cardiac electrical signal, detects a noisy signal segment based on the signal morphology parameter; and withholds detection of a tachyarrhythmia episode in response to detecting a threshold number of noisy signal segments.

公开(公告)号：US20200170532A1

公开(公告)日：2020-06-04

申请号：US16785916

申请日：2020-02-10

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Jian CAO ,  Yuanzhen LIU

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

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：US20190192020A1

公开(公告)日：2019-06-27

申请号：US16291349

申请日：2019-03-04

Applicant: Medtronic, Inc.

Inventor： Jian CAO ,  Elise HIGGINS

IPC: A61B5/046 ,  A61B5/04

CPC classification number: A61B5/046 ,  A61B5/04012 ,  A61N1/3962

Abstract: A method and medical device for determining a cardiac episode that includes sensing a cardiac signal, identifying the signal sensed during a predetermined time interval as one of a cardiac event, a non-cardiac event, and an unclassified event, determining a number of identified cardiac events, determining a number of identified unclassified events, and determining whether the cardiac episode is occurring in response to the number of identified cardiac events being greater than a cardiac event count threshold and the number of identified unclassified events being less than an unclassified event count threshold.

公开(公告)号：US20190184164A1

公开(公告)日：2019-06-20

申请号：US16217207

申请日：2018-12-12

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Jian CAO

IPC: A61N1/362 ,  A61N1/365 ,  A61B5/0456 ,  A61B5/0464 ,  A61N1/39

CPC classification number: A61N1/3621 ,  A61B5/0456 ,  A61B5/0464 ,  A61N1/3624 ,  A61N1/36592 ,  A61N1/3704 ,  A61N1/39622

Abstract: Techniques are described for discriminating SVT and, in particular, rapidly conducting AF. The techniques include detecting an onset of a fast rate of ventricular events sensed from a cardiac electrical signal and detecting a pause in the fast rate of ventricular sensed events. A threshold number of ventricular event intervals required to detect a ventricular tachyarrhythmia is detected with each of the threshold number of ventricular event intervals being less than a tachyarrhythmia detection interval. Detection of the ventricular tachyarrhythmia and an electrical stimulation therapy for treating the ventricular tachyarrhythmia are withheld in response to at least the pause being detected.

公开(公告)号：US20180311504A1

公开(公告)日：2018-11-01

申请号：US15497546

申请日：2017-04-26

Applicant: Medtronic, Inc.

Inventor： Jian CAO ,  Alan CHENG

IPC: A61N1/365 ,  A61B5/04 ,  A61B5/0464 ,  A61N1/39 ,  A61N1/372

CPC classification number: A61N1/36592 ,  A61B5/04012 ,  A61B5/042 ,  A61B5/0452 ,  A61B5/04525 ,  A61B5/0464 ,  A61B5/0468 ,  A61B5/4836 ,  A61B5/6869 ,  A61B5/7282 ,  A61N1/0504 ,  A61N1/0563 ,  A61N1/365 ,  A61N1/3704 ,  A61N1/37217 ,  A61N1/37247 ,  A61N1/39622 ,  A61N1/3987

Abstract: An implantable medical device performs a method that includes detecting a cardiac event interval that is greater than a P-wave oversensing threshold interval. In response to detecting the cardiac event interval greater than the P-wave oversensing threshold interval, the device determines the amplitude of the sensed cardiac signal and withholds restarting a pacing interval in response to the amplitude satisfying P-wave oversensing criteria. A pacing pulse may be generated in response to the pacing interval expiring without sensing an intrinsic cardiac electrical event that is not detected as a P-wave oversensing event.

公开(公告)号：US20180303368A1

公开(公告)日：2018-10-25

申请号：US15496309

申请日：2017-04-25

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Jian CAO ,  Yuanzhen LIU

IPC: A61B5/0464 ,  A61N1/39 ,  A61B5/04 ,  A61B5/0456

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：US20170281033A1

公开(公告)日：2017-10-05

申请号：US15084511

申请日：2016-03-30

Applicant: Medtronic, Inc.

Inventor： Elise J. HIGGINS ,  Mark L. BROWN ,  Jian CAO

IPC: A61B5/0464 ,  A61N1/39 ,  A61B5/046 ,  A61B5/042 ,  A61B5/04 ,  A61B5/0456

CPC classification number: A61B5/0464 ,  A61B5/002 ,  A61B5/02405 ,  A61B5/04012 ,  A61B5/0422 ,  A61B5/0456 ,  A61B5/046 ,  A61B5/0472 ,  A61B5/4836 ,  A61B5/7264 ,  A61B2560/028 ,  A61N1/3925 ,  A61N1/3956 ,  A61N1/3987

Abstract: A medical device is configured to detect an atrial tachyarrhythmia episode. The device senses a cardiac signal, identifies R-waves in the cardiac signal attendant ventricular depolarizations and determines classification factors from the R-waves identified over a predetermined time period. The device classifies the predetermined time period as one of unclassified, atrial tachyarrhythmia and non-atrial tachyarrhythmia by comparing the determined classification factors to classification criteria. A classification criterion is adjusted from a first classification criterion to a second classification criterion after at least one time period being classified as atrial tachyarrhythmia. An atrial tachyarrhythmia episode is detected by the device in response to at least one subsequent time period being classified as atrial tachyarrhythmia based on the adjusted classification criterion.