公开(公告)号：US20150305640A1

公开(公告)日：2015-10-29

申请号：US14686947

申请日：2015-04-15

Applicant: Medtronic, Inc.

Inventor： James D. REINKE ,  Xusheng ZHANG ,  Vinod SHARMA ,  Vladimir P. NIKOLSKI ,  Michael B. TERRY ,  Scott A. HARELAND ,  Daniel L. HANSEN ,  Donna M. SALMI

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

Abstract: In situations in which an implantable medical device (IMD) (e.g., an extravascular ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the IMD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the IMD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the IMD includes a pace pulse detector that detects, based on the processing of sensed electrical signals, delivery of a pacing pulse from a second implantable medical device and blank, based on the detection of the pacing pulse, the sensed electrical signal to remove the pacing pulse from the sensed electrical signal.

Abstract translation: 在可植入医疗装置（IMD）（例如，血管外ICD））与无引线起搏装置（LPD）共同植入的情况下，IMD知道LPD何时发出起搏， 心动过速起搏（ATP）。 本文描述了用于利用IMD和基于感测到的电信号，起搏脉冲和调整操作来考虑检测到的脉冲的技术，例如消隐感测的电信号或修改快速性心律失常检测算法。 在一个示例中，IMD包括步速脉冲检测器，其基于感测到的电信号的处理，基于起搏脉冲的检测来检测来自第二可植入医疗设备和空白的起搏脉冲的传送，感测到的电信号 以从感测到的电信号中去除起搏脉冲。

公开(公告)号：US20250072810A1

公开(公告)日：2025-03-06

申请号：US18730301

申请日：2023-02-14

Applicant: Medtronic, Inc.

Inventor： Michael W. HEINKS ,  Alfonso ARANDA HERNANDEZ ,  Timothy A. EBELING ,  Saul E. GREENHUT ,  Scott R. HAWKINSON ,  Troy E. JACKSON ,  Yuanzhen LIU ,  Irving J. SANCHEZ ,  James VANDER HEYDEN ,  Xusheng ZHANG

IPC: A61B5/363 ,  A61B5/00 ,  A61B5/35 ,  A61B5/352

Abstract: A medical device comprises a sensing circuit configured to sense at least one cardiac electrical signal, sense first ventricular event signals from the at least one cardiac electrical signal according to a sensitivity setting set to a first amplitude; and a control circuit in communication with the sensing circuit, the control circuit configured to determine that the at least one cardiac electrical signal meets suspected undersensing criteria, in response to determining that the suspected undersensing criteria are met, perform a morphology analysis of a first cardiac signal segment acquired from a first cardiac electrical signal of the at least one cardiac electrical signal sensed by the sensing circuit over a first predetermined time interval, determine that the first cardiac signal segment is a first tachyarrhythmia segment based on the morphology analysis, and adjust the sensitivity setting from the first amplitude to a second amplitude less than the first amplitude in response to determining that the first cardiac signal segment is a first tachyarrhythmia segment.

公开(公告)号：US20240407703A1

公开(公告)日：2024-12-12

申请号：US18812367

申请日：2024-08-22

Applicant: Medtronic, Inc.

Inventor： James D. REINKE ,  Xusheng ZHANG ,  Vinod SHARMA ,  Vladimir P. NIKOLSKI ,  Michael B. TERRY ,  Scott A. HARELAND ,  Daniel L. HANSEN ,  Donna M. SALMI

IPC: A61B5/363 ,  A61B5/00 ,  A61B5/346 ,  A61N1/37

Abstract: In situations in which an implantable medical device (e.g., a subcutaneous ICD) is co-implanted with a leadless pacing device (LPD), it may be important that the subcutaneous ICD knows when the LPD is delivering pacing, such as anti-tachycardia pacing (ATP). Techniques are described herein for detecting, with the ICD and based on the sensed electrical signal, pacing pulses and adjusting operation to account for the detected pulses, e.g., blanking the sensed electrical signal or modifying a tachyarrhythmia detection algorithm. In one example, the ICD includes a first pace pulse detector configured to obtain a sensed electrical signal and analyze the sensed electrical signal to detect a first type of pulses having a first set of characteristics and a second pace pulse detector configured to obtain the sensed electrical signal and analyze the sensed electrical signal to detect a second type of pulses having a second set of characteristics.

公开(公告)号：US20240325762A1

公开(公告)日：2024-10-03

申请号：US18739312

申请日：2024-06-10

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Jian Cao

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

CPC classification number: A61N1/3621 ,  A61B5/352 ,  A61B5/363 ,  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：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：US20230100431A1

公开(公告)日：2023-03-30

申请号：US17823055

申请日：2022-08-29

Applicant: Medtronic, Inc.

Inventor： Yuanzhen LIU ,  Alfonso ARANDA HERNANDEZ ,  Timothy A. EBELING ,  Saul E. GREENHUT ,  Michael W. HEINKS ,  Jean E. HUDSON ,  Troy E. JACKSON ,  Irving J. SANCHEZ ,  James A. VANDER HEYDEN ,  Xusheng ZHANG

IPC: A61B5/363 ,  A61B5/35

Abstract: A medical device is configured to sense first ventricular event signals from a first cardiac electrical signal and sense second ventricular event signals from a second cardiac electrical signal. The medical device is configured to determine sensed event data in response to the first ventricular event signals and the second ventricular event signals. The medical device may select one of the first cardiac electrical signal or the second cardiac electrical signal for providing input for tachyarrhythmia detection based on the sensed event data.

公开(公告)号：US20210402197A1

公开(公告)日：2021-12-30

申请号：US17472614

申请日：2021-09-11

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Paul J. DEGROOT

IPC: A61N1/39 ,  A61N1/365 ,  A61B5/00 ,  A61B5/316 ,  A61B5/352 ,  A61B5/363

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：US20210402190A1

公开(公告)日：2021-12-30

申请号：US17350153

申请日：2021-06-17

Applicant: Medtronic, Inc.

Inventor： Xusheng ZHANG ,  Yuanzhen LIU

IPC: A61N1/37 ,  A61B5/363 ,  A61B5/341 ,  A61B5/00 ,  A61N1/362 ,  A61N1/39

Abstract: A medical device processor is configured to receive a first cardiac electrical signal sensed from a first sensing electrode vector, receive a second cardiac electrical signal sensed from a second sensing electrode vector different than the first sensing electrode vector, and construct a third cardiac electrical signal from the first cardiac electrical signal and the second cardiac electrical signal. In some examples, the system determines sensed cardiac events according to at least one setting of a cardiac event sensing threshold control parameter from at least the third cardiac electrical signal and may determine at least one acceptable setting of a sensing control parameter based on the determined sensed cardiac events. The processor may generate an output representative of the determined sensed cardiac events.

公开(公告)号：US20210353233A1

公开(公告)日：2021-11-18

申请号：US16874920

申请日：2020-05-15

Applicant: Medtronic, Inc.

Inventor： Saul E. GREENHUT ,  Yuanzhen LIU ,  Xusheng ZHANG

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

Abstract: A medical device is configured to sense event signals from a cardiac electrical signal and determine maximum amplitudes of cardiac electrical signal segments associated with sensed event signals. The medical device is configured to determine at least one tachyarrhythmia metric based on at least a greatest one of the determined maximum amplitudes. The medical device may determine when the at least one tachyarrhythmia metric does not meet true tachyarrhythmia evidence and, in response, determine when the maximum amplitudes meet suspected noise criteria. The medical device may withhold a tachyarrhythmia detection and tachyarrhythmia therapy when suspected noise criteria are met.

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.