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：US20190314637A1

公开(公告)日：2019-10-17

申请号：US16391183

申请日：2019-04-22

Applicant: Medtronic, Inc.

Inventor： Robert W. Stadler ,  Raja N. Ghanem ,  Xusheng Zhang

IPC: A61N1/39 ,  A61B5/0456 ,  A61B5/046 ,  A61B5/042 ,  A61B5/00 ,  A61B5/04 ,  A61B5/0464 ,  A61N1/362 ,  A61N1/05 ,  A61B5/0468

Abstract: A method and system for use with an implantable medical device for subcutaneous implant within a patient to determine a likelihood of the patient experiencing a cardiac event that includes sensing a cardiac signal along a plurality of different sensing vectors, determining state information of each vector of the plurality of sensing vectors, determining a cross correlation of the determined state information of each vector of the plurality of sensing vectors, comparing the cross correlation of the determined state information of each vector of the plurality of sensing vectors to a threshold, and detecting the cardiac event in response to the comparing.

公开(公告)号：US20190290153A1

公开(公告)日：2019-09-26

申请号：US16372868

申请日：2019-04-02

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang

IPC: A61B5/04 ,  A61N1/362 ,  A61B5/0456 ,  A61B5/0408 ,  A61B5/0452 ,  A61B5/00

Abstract: A method and medical device for determining sensing vectors that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors, determining a sensing vector metric in response to the sensed cardiac signals, determining a morphology metric associated with a morphology of the sensed cardiac signals, determining vector selection metrics in response to the determined sensing vector metric and the determined morphology setting, and selecting a sensing vector of the plurality of sensing vectors in response to the determined vector selection metrics.

公开(公告)号：US10406373B2

公开(公告)日：2019-09-10

申请号：US15416461

申请日：2017-01-26

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang

IPC: A61N1/362 ,  A61N1/39 ,  A61B5/0464 ,  A61B5/04 ,  A61N1/37 ,  A61N1/365

Abstract: An extra-cardiovascular implantable cardioverter defibrillator is configured to store a cardiac signal segment in response to sensing a cardiac event and obtain a notch filtered signal segment by notch filtering the cardiac signal segment. The ICD determines a count of crossings of the notch filtered signal segment by the cardiac signal segment and determines whether electromagnetic interference (EMI) is present in the cardiac signal segment based on a value of the count.

公开(公告)号：US20190232069A1

公开(公告)日：2019-08-01

申请号：US16377977

申请日：2019-04-08

Applicant: Medtronic, Inc.

Inventor： Saul E. Greenhut ,  Robert W. Stadler ,  Xusheng Zhang

IPC: A61N1/39 ,  A61B5/0464 ,  A61N1/37 ,  A61B5/0456 ,  A61B5/00

CPC classification number: A61N1/3925 ,  A61B5/0456 ,  A61B5/0464 ,  A61B5/4836 ,  A61B5/686 ,  A61B5/7264 ,  A61N1/3706 ,  A61N1/3962 ,  A61N1/3987

Abstract: A method and medical device for adjusting a blanking period that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors, determining whether to adjust a blanking period during a first operating state, advancing from the first operating state to a second operating state in response to the sensed cardiac signals, determining, while in the second operating state, whether the blanking period was adjusted while in the first operating state, and adjusting the blanking period while in the second operating state in response to the blanking period being adjusted while in the first operating state.

公开(公告)号：US10328274B2

公开(公告)日：2019-06-25

申请号：US15495104

申请日：2017-04-24

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Paul J. Degroot

IPC: A61N1/00 ,  A61N1/39 ,  A61B5/04 ,  A61B5/0456 ,  A61B5/0464 ,  A61B5/00 ,  A61N1/365 ,  A61N1/37

Abstract: A cardiac medical system, such as an implantable cardioverter defibrillator (ICD) system, receives a cardiac electrical signal by and senses cardiac events when the signal crosses an R-wave sensing threshold. The system determines at least one sensed event parameter from the cardiac electrical signal for consecutive cardiac events sensed by the sensing circuit and compares the sensed event parameters to P-wave oversensing criteria. The system detects P-wave oversensing in response to the sensed event parameters meeting the P-wave oversensing criteria; and adjusts at least one of an R-wave sensing control parameter or a therapy delivery control parameter in response to detecting the P-wave oversensing.

公开(公告)号：US20190175918A1

公开(公告)日：2019-06-13

申请号：US16213539

申请日：2018-12-07

Applicant: Medtronic, Inc.

Inventor： Nathan A. Grenz ,  Karen J. Kleckner ,  Xusheng Zhang

IPC: A61N1/37 ,  A61N1/372

Abstract: A method and device for detecting phrenic nerve stimulation (PNS) in, or using, a cardiac medical device. A test signal sensitive to contraction of a diaphragm of a patient may be sensed and signal artifacts of the test signal within each of a first window of the test signal prior to a predetermined cardiac signal and a second window of the test signal subsequent to the predetermined cardiac signal may be determined. The PNS beat criteria may be evaluated, for example, using the test signal, which may be a heart sounds signal.

公开(公告)号：US10278601B2

公开(公告)日：2019-05-07

申请号：US14260408

申请日：2014-04-24

Applicant: Medtronic, Inc.

Inventor： Saul E Greenhut ,  Robert W Stadler ,  Xusheng Zhang

IPC: A61B5/05 ,  A61B5/04 ,  A61B5/0408 ,  A61B5/0464 ,  A61B5/0472 ,  A61N1/00

Abstract: A method and medical device for determining sensing vectors that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors, determining signal differences during a detection window in each of the plurality of sensing vectors, ranking sensing vectors of the plurality of sensing vectors in response to the determined signal differences, and selecting one or more sensing vectors of the plurality of sensing vectors in response to the determined rankings.

公开(公告)号：US10265534B2

公开(公告)日：2019-04-23

申请号：US15334410

申请日：2016-10-26

Applicant: Medtronic, Inc.

Inventor： Saul E. Greenhut ,  Robert J. Nehls ,  Walter H. Olson ,  Xusheng Zhang ,  Wade M. Demmer ,  Troy E. Jackson ,  James D. Reinke

IPC: A61N1/00 ,  A61N1/39 ,  A61N1/372 ,  A61N1/375 ,  A61N1/362 ,  A61N1/05 ,  A61N1/365

Abstract: Techniques and systems for monitoring cardiac arrhythmias and delivering electrical stimulation therapy using a subcutaneous implantable cardioverter defibrillator (SICD) and a leadless pacing device (LPD) are described. For example, the SICD may detect a tachyarrhythmia within a first electrical signal from a heart and determine, based on the tachyarrhythmia, to deliver anti-tachyarrhythmia shock therapy to the patient to treat the detected arrhythmia. The LPD may receive communication from the SICD requesting the LPD deliver anti-tachycardia pacing to the heart and determine, based on a second electrical signal from the heart sensed by the LPD, whether to deliver anti-tachycardia pacing (ATP) to the heart. In this manner, the SICD and LPD may communicate to coordinate ATP and/or cardioversion/defibrillation therapy. In another example, the LPD may be configured to deliver post-shock pacing after detecting delivery of anti-tachyarrhythmia shock therapy.

公开(公告)号：US10226639B2

公开(公告)日：2019-03-12

申请号：US15168590

申请日：2016-05-31

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang

IPC: A61N1/39 ,  A61B5/04 ,  A61B5/042

Abstract: A method and medical device for detecting a cardiac event that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector sensing a first interval and a second sensing vector simultaneously sensing a second, determining, for each of the first interval and the second interval, whether each beat of the plurality of beats is one of a match beat and a non-match beat, determining whether each beat of the plurality of beats is one of a high confidence beat and a low confidence beat, determining, for each of the first interval and the second interval, the number of beats determined to be both a non-match beat and a high confidence beat is greater than a non-match threshold, and determining whether to deliver therapy for the cardiac event in response to identifying of each of the first interval and the second interval as being one of shockable and not shockable.