公开(公告)号：US20160213273A1

公开(公告)日：2016-07-28

申请号：US14604363

申请日：2015-01-23

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Paul J. DeGroot

IPC: A61B5/0456 ,  A61B5/00 ,  A61B5/0452 ,  A61B5/0468 ,  A61N1/37 ,  A61B5/04

CPC classification number: A61B5/0456 ,  A61B5/04525 ,  A61B5/046 ,  A61B5/4836 ,  A61B5/686 ,  A61N1/368 ,  A61N1/3702

Abstract: A method and medical device for identifying a cardiac waveform that includes sensing cardiac signals, determining a plurality of RR-intervals in response to the sensed cardiac signals, determining R-waves associated with the plurality of RR-intervals, determining P-wave windows in response to the determined R-waves, adjusting P-waves within the P-wave windows, identifying a P-wave parameter in response to the adjusted P-waves, and determining whether a P-wave occurs in response to the identified P-wave parameter.

Abstract translation: 一种用于识别包括感测心脏信号的心脏波形的方法和医疗装置，响应于所感测到的心脏信号确定多个RR间隔，确定与多个RR间隔相关联的R波，确定与所述多个RR间隔相关的P波窗口 对所确定的R波进行响应，调整P波窗内的P波，响应于调整的P波识别P波参数，以及响应于所识别的P波来确定P波是否发生 参数。

公开(公告)号：US20160113534A1

公开(公告)日：2016-04-28

申请号：US14520798

申请日：2014-10-22

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Paul J. DeGroot

IPC: A61B5/046 ,  A61B5/0456 ,  A61B5/00

CPC classification number: A61B5/046 ,  A61B5/0456 ,  A61B5/686 ,  A61N1/3962

Abstract: A method and medical device for determining a cardiac event that includes sensing a cardiac signal, determining a predetermined number of sensed cardiac events in response to the sensed cardiac signal, determining a plurality of sensed event windows in response to the predetermined number of the sensed cardiac events, determining, for each of the plurality of sensed event windows, whether a number of paced events is less than a paced event threshold, determining whether intervals within the sensed event windows having a number of paced events less than the paced event threshold are greater than an interval threshold, determining an interval difference factor for each of the plurality of windows having intervals less than the interval threshold, and determining the cardiac event in response to the interval difference factors determined for each of the plurality of windows.

Abstract translation: 一种用于确定心脏事件的方法和医疗装置，包括感测心脏信号，响应于所感测到的心脏信号确定感测的心脏事件的预定数量，响应于感测的心脏的预定数量确定多个感测到的事件窗口 事件，对于多个感测到的事件窗口中的每一个，确定一些节奏事件是否小于节奏事件阈值，确定感测事件窗口内具有小于起搏事件阈值的多个节奏事件中的间隔是否更大 确定具有小于所述间隔阈值的间隔的所述多个窗口中的每一个的间隔差因子，以及响应于针对所述多个窗口中的每一个确定的间隔差异因子确定所述心脏事件。

公开(公告)号：US12274888B2

公开(公告)日：2025-04-15

申请号：US18311861

申请日：2023-05-03

Applicant: Medtronic, Inc.

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

IPC: A61B5/0464 ,  A61B5/00 ,  A61B5/283 ,  A61B5/316 ,  A61B5/341 ,  A61B5/349 ,  A61B5/35 ,  A61B5/352 ,  A61B5/363 ,  A61N1/39 ,  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：US12220586B2

公开(公告)日：2025-02-11

申请号：US17743436

申请日：2022-05-12

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Alan Cheng

IPC: A61N1/365 ,  A61B5/00 ,  A61B5/283 ,  A61B5/316 ,  A61B5/349 ,  A61B5/35 ,  A61B5/363 ,  A61B5/364 ,  A61N1/05 ,  A61N1/37 ,  A61N1/372 ,  A61N1/39

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：US12011278B2

公开(公告)日：2024-06-18

申请号：US16785916

申请日：2020-02-10

Applicant: Medtronic, Inc.

Inventor： Xusheng Zhang ,  Jian Cao ,  Yuanzhen Liu

IPC: A61B5/363 ,  A61B5/346 ,  A61B5/352 ,  A61N1/08 ,  A61N1/365 ,  A61N1/39 ,  A61N1/02 ,  A61N1/05 ,  A61N1/362 ,  A61N1/37

CPC classification number: A61B5/363 ,  A61B5/346 ,  A61B5/352 ,  A61N1/08 ,  A61N1/36585 ,  A61N1/3925 ,  A61N1/3956 ,  A61N1/3987 ,  A61N1/025 ,  A61N1/0563 ,  A61N1/0587 ,  A61N1/3621 ,  A61N1/3704

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：US11607550B2

公开(公告)日：2023-03-21

申请号：US16901110

申请日：2020-06-15

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Wade M. Demmer ,  Maureen E. Lybarger ,  Elizabeth A. Mattson ,  Todd J. Sheldon ,  Zhongping Yang ,  Xiaohong Zhou

IPC: A61N1/365 ,  A61N1/37

Abstract: A medical device is configured to sense a cardiac electrical signal and determine from the cardiac electrical signal at least one of a maximum peak amplitude of a positive slope of the cardiac electrical signal and a maximum peak time interval from a pacing pulse to the maximum peak amplitude. The device is configured to determine a capture type of the pacing pulse based on at least one or both of the maximum peak amplitude and the maximum peak time interval.

公开(公告)号：US20210339020A1

公开(公告)日：2021-11-04

申请号：US17219510

申请日：2021-03-31

Applicant: Medtronic, Inc.

Inventor： Alan Cheng ,  Jian Cao ,  Hai Huang

IPC: A61N1/362 ,  A61N1/05 ,  A61N1/36

Abstract: Various embodiments of a ventricular assist system and a method of using such system are disclosed. The system includes a pump adapted to be connected to a heart of a patient, an outflow cannula including a first end adapted to be connected to an outlet of the pump and a second end adapted to be connected to an artery of the patient, and an electrode disposed on an outer surface of the outflow cannula and adapted to be disposed adjacent to an exterior wall of the heart. The system further includes a controller electrically connected to the pump and the electrode, where the controller is adapted to provide a pacing signal to the electrode.

公开(公告)号：US10661073B2

公开(公告)日：2020-05-26

申请号：US16200846

申请日：2018-11-27

Applicant: Medtronic, Inc.

Inventor： Mark T. Marshall ,  Jian Cao ,  Melissa G. T. Christie ,  Paul J. Degroot ,  Vladimir P. Nikolski ,  Amy E. Thompson-Nauman

IPC: A61N1/05 ,  A61N1/39

Abstract: Implantable medical electrical leads having electrodes arranged such that a defibrillation coil electrode and a pace/sense electrode(s) are concurrently positioned substantially over the ventricle when implanted as described. The leads include an elongated lead body having a distal portion and a proximal end, a connector at the proximal end of the lead body, a defibrillation electrode located along the distal portion of the lead body, wherein the defibrillation electrode includes a first electrode segment and a second electrode segment proximal to the first electrode segment by a distance. The leads may include at least one pace/sense electrode, which in some instances, is located between the first defibrillation electrode segment and the second defibrillation electrode segment.

公开(公告)号：US10470681B2

公开(公告)日：2019-11-12

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 ,  A61B5/0245 ,  A61B5/0464 ,  A61N1/39 ,  A61B5/042 ,  A61N1/02 ,  A61N1/05 ,  A61N1/365 ,  A61N1/37 ,  A61B5/00 ,  A61B5/0456 ,  A61B5/021 ,  A61N1/36 ,  A61N1/00

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：US10350417B2

公开(公告)日：2019-07-16

申请号：US14950952

申请日：2015-11-24

Applicant: Medtronic, Inc.

Inventor： Jian Cao ,  Paul J DeGroot ,  Todd J Sheldon

IPC: A61N1/37 ,  A61N1/365 ,  A61N1/372 ,  A61N1/375 ,  A61B5/0452 ,  A61B5/0456 ,  A61B5/00

Abstract: An implantable medical device system includes an extracardiac sensing device and an intracardiac pacemaker. The sensing device senses a P-wave attendant to an atrial depolarization of the heart via housing-based electrodes carried by the sensing device when the sensing device is implanted outside the cardiovascular system and sends a trigger signal to the intracardiac pacemaker in response to sensing the P-wave. The intracardiac pacemaker detects the trigger signal and schedules a ventricular pacing pulse in response to the detected trigger signal.