公开(公告)号：US11654291B2

公开(公告)日：2023-05-23

申请号：US17105787

申请日：2020-11-27

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Saul E. Greenhut ,  Xusheng Zhang

IPC: A61B5/0464 ,  A61N1/39 ,  A61B5/00 ,  A61B5/35 ,  A61B5/283 ,  A61B5/316 ,  A61B5/341 ,  A61B5/349 ,  A61B5/352 ,  A61B5/363 ,  A61B5/364

CPC classification number: A61N1/3956 ,  A61B5/283 ,  A61B5/316 ,  A61B5/341 ,  A61B5/349 ,  A61B5/35 ,  A61B5/352 ,  A61B5/363 ,  A61B5/4836 ,  A61B5/686 ,  A61B5/7221 ,  A61N1/3925 ,  A61N1/3987 ,  A61B5/364

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 ICD determines morphology match scores from the stored time segments of the second cardiac electrical signal and, based on the morphology match scores, withholds detection of a tachyarrhythmia episode. In some examples, the ICD detects T-wave oversensing based on the morphology match scores and withholds detection of a tachyarrhythmia episode in response to detecting the T-wave oversensing.

公开(公告)号：US11534617B2

公开(公告)日：2022-12-27

申请号：US16707378

申请日：2019-12-09

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang

IPC: A61N1/39 ,  A61B5/00 ,  A61B5/35 ,  A61B5/287 ,  A61B5/341 ,  A61B5/361 ,  A61B5/363

Abstract: A method and medical device for detecting a cardiac event that includes sensing cardiac signals from a plurality of electrodes forming a first sensing vector sensing a first interval of the cardiac signal during a predetermined time period and a second sensing vector simultaneously sensing a second interval of the cardiac signal during the predetermined time period, identifying each of the first interval and the second interval as being one of shockable and not shockable in response to first processing of the first interval and the second interval and in response to second processing of one or both of the first interval and the second interval, the second processing being different from the first processing, and determining whether to deliver therapy for the cardiac event in response to identifying each of the first interval and the second interval as being one of shockable and not shockable in response to both the first processing and the second processing of the first interval and the second interval.

公开(公告)号：US11305124B2

公开(公告)日：2022-04-19

申请号：US16551412

申请日：2019-08-26

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Jeffrey M. Gillberg ,  Thomas J. Mullen

IPC: A61N1/362 ,  A61N1/372 ,  A61N1/368 ,  A61N1/365 ,  A61B7/04 ,  A61N1/37

Abstract: A medical device system and associated method predict a patient response to a cardiac therapy. The system includes for delivering cardiac pacing pulses to a patient's heart coupled to a cardiac sensing module and a cardiac pacing module for generating cardiac pacing pulses and controlling delivery of the pacing pulses at multiple pace parameter settings. An acoustical sensor obtains heart sound signals. A processor is enabled to receive the heart sound signals, derive a plurality of heart sound signal parameters from the heart sound signals, and determine a trend of each of the plurality of heart sound signal parameters with respect to the plurality of pace parameter settings. An external display is configured to present the trend of at least one heart sound parameter with respect to the plurality of pace parameter settings.

公开(公告)号：US11116981B2

公开(公告)日：2021-09-14

申请号：US16217207

申请日：2018-12-12

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Jian Cao

IPC: A61N1/36 ,  A61N1/362 ,  A61N1/37 ,  A61B5/352 ,  A61B5/363 ,  A61N1/39 ,  A61N1/365

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：US20210146141A1

公开(公告)日：2021-05-20

申请号：US17156960

申请日：2021-01-25

Applicant: Medtronic, Inc.

Inventor： Melissa G.T. Christie ,  Ronald A. Drake ,  Vladimir P. Nikolski ,  Bushan K. Purushothaman ,  Xusheng Zhang

IPC: A61N1/365 ,  A61N1/38 ,  A61N1/37 ,  A61N1/39 ,  A61B5/11 ,  A61B5/00 ,  A61B5/08 ,  A61N1/04 ,  A61B5/35 ,  A61B5/341 ,  A61B5/352 ,  A61B5/363

Abstract: In some examples, a medical device system includes an electrode. The medical device system may include impedance measurement circuitry coupled to the electrode, the impedance measurement circuitry may be configured to generate an impedance signal indicating impedance proximate to the electrode. The medical device system may include processing circuitry that may be configured to identify a first component of the impedance signal. The first component of the impedance signal may be correlated to a cardiac event. The processing circuitry may be configured to determine that the cardiac event occurred based on the identification of the first component of the impedance signal.

公开(公告)号：US10898720B2

公开(公告)日：2021-01-26

申请号：US16161534

申请日：2018-10-16

Applicant: Medtronic, Inc.

Inventor： Melissa G. T. Christie ,  Ronald A. Drake ,  Vladimir P. Nikolski ,  Bushan K. Purushothaman ,  Xusheng Zhang

IPC: A61B5/00 ,  A61B5/04 ,  A61B5/0452 ,  A61B5/0456 ,  A61B5/046 ,  A61B5/0464 ,  A61B5/053 ,  A61B5/08 ,  A61B5/11 ,  A61N1/04 ,  A61N1/05 ,  A61N1/362 ,  A61N1/365 ,  A61N1/37 ,  A61N1/38 ,  A61B5/0468 ,  A61N1/39

Abstract: In some examples, a medical device system includes an electrode. The medical device system may include impedance measurement circuitry coupled to the electrode, the impedance measurement circuitry may be configured to generate an impedance signal indicating impedance proximate to the electrode. The medical device system may include processing circuitry that may be configured to identify a first component of the impedance signal. The first component of the impedance signal may be correlated to a cardiac event. The processing circuitry may be configured to determine that the cardiac event occurred based on the identification of the first component of the impedance signal.

公开(公告)号：US10850113B2

公开(公告)日：2020-12-01

申请号：US15655082

申请日：2017-07-20

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Saul E. Greenhut ,  Xusheng Zhang

IPC: A61B5/0464 ,  A61N1/39 ,  A61B5/00 ,  A61B5/0452 ,  A61B5/04 ,  A61B5/042 ,  A61B5/0456 ,  A61B5/0468

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 ICD determines morphology match scores from the stored time segments of the second cardiac electrical signal and, based on the morphology match scores, withholds detection of a tachyarrhythmia episode. In some examples, the ICD detects T-wave oversensing based on the morphology match scores and withholds detection of a tachyarrhythmia episode in response to detecting the T-wave oversensing.

公开(公告)号：US10799710B2

公开(公告)日：2020-10-13

申请号：US15790255

申请日：2017-10-23

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Gerald P. Arne ,  Timothy A. Ebeling ,  Yanina Grinberg ,  Michael W. Heinks ,  Paul R. Solheim ,  Xusheng Zhang

IPC: A61N1/39 ,  A61N1/362 ,  A61N1/365 ,  A61N1/372 ,  A61B5/0456 ,  A61N1/05

Abstract: An implantable medical device system is configured to sense cardiac events in response to a cardiac electrical signal crossing a cardiac event sensing threshold. A control circuit is configured to determine a drop time interval based on a heart rate and control a sensing circuit to hold the cardiac event sensing threshold at a threshold value during the drop time interval.

公开(公告)号：US10675471B2

公开(公告)日：2020-06-09

申请号：US15677204

申请日：2017-08-15

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Yanina Grinberg ,  Paul R. Solheim ,  Troy E. Jackson ,  Timothy A. Ebeling ,  Vladimir P. Nikolski

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

Abstract: An implantable medical device system is configured to detect a tachyarrhythmia from a cardiac electrical signal and start an ATP therapy delay period. The implantable medical device determines whether the cardiac electrical signal received during the ATP therapy delay period satisfies ATP delivery criteria. A therapy delivery module is controlled to cancel the delayed ATP therapy if the ATP delivery criteria are not met and deliver the delayed ATP therapy if the ATP delivery criteria are met.

公开(公告)号：US10583306B2

公开(公告)日：2020-03-10

申请号：US15416827

申请日：2017-01-26

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Saul E. Greenhut ,  Michael W. Heinks ,  Paul R. Solheim

IPC: A61N1/39 ,  A61N1/362 ,  A61N1/37 ,  A61N1/365 ,  A61N1/08

Abstract: An implantable cardioverter defibrillator (ICD) starts a timer set to a time interval in response to a cardiac electrical signal crossing a noise threshold amplitude and resets the timer to the time interval in response to each crossing of the noise threshold amplitude by the cardiac electrical signal that occurs prior to the time interval expiring. A control circuit of the ICD determines a parameter of the behavior of the timer and identifies a sensed cardiac event as an electromagnetic interference (EMI) event based on the parameter. The ICD may detect EMI in response to the EMI event and withhold a tachyarrhythmia detection or therapy in response to EMI detection.