公开(公告)号：US11260234B2

公开(公告)日：2022-03-01

申请号：US16702928

申请日：2019-12-04

Applicant: Medtronic, Inc.

Inventor： Juliana E. Pronovici ,  James W. Busacker ,  Keelia Doyle ,  Vincent P. Ganion ,  Greggory R. Herr ,  Todd J. Sheldon ,  Vincent E. Splett

IPC: A61N1/368 ,  A61N1/365

Abstract: A pacemaker is configured to operate in an atrial synchronous ventricular pacing mode and, after expiration of a conduction check time interval, switch to an asynchronous ventricular pacing mode that includes setting a ventricular pacing interval to a base pacing rate interval. The pacemaker is further configured to determine when atrioventricular block detection criteria are satisfied during the asynchronous ventricular pacing mode and, responsive to the atrioventricular block detection criteria being satisfied, switch back to the atrial synchronous ventricular pacing mode.

公开(公告)号：US20180117324A1

公开(公告)日：2018-05-03

申请号：US15499692

申请日：2017-04-27

Applicant: Medtronic, Inc.

Inventor： Eric A. Schilling ,  Robert A. Betzold ,  Greggory R. Herr

IPC: A61N1/362 ,  A61N1/365

CPC classification number: A61N1/3622 ,  A61N1/056 ,  A61N1/365 ,  A61N1/36507 ,  A61N1/3682

Abstract: A method of employing an implantable medical device to detect pacemaker mediated tachycardia (PMT) and adjusting a parameter (e.g. PVARP) in response to confirmation of the PMT. The method comprises, with a processor located in the implantable medical device, (1) measuring a first Vp-As (VA1), (2) lengthening SAV by 50 ms for 1 beat in response to measuring VA1, (3) measuring a second Vp-As (VA2), (4) returning to a normal SAV, (5) measuring a third Vp-As (VA3), (6) determining whether VA1=VA2 and VA1=VA3, (7) in response to determining whether VA1=VA2 and VA1=VA3, confirming presence of PMT, and (8) in response to confirming presence of PMT, PVARP is extended.

公开(公告)号：US20140135867A1

公开(公告)日：2014-05-15

申请号：US13790683

申请日：2013-03-08

Applicant: Medtronic, Inc.

Inventor： Wade M. Demmer ,  Greggory R. Herr ,  Supriya Ketkar ,  Karen J. Kleckner ,  Todd J. Sheldon ,  Robert W. Stadler

IPC: A61N1/37

CPC classification number: A61N1/371 ,  A61N1/3686 ,  A61N1/3712

Abstract: Various techniques for facilitating selection of a pacing vector for pacing a chamber of a heart are described. One example method described includes, for each of a plurality of vectors, delivering a pacing pulse to capture a first heart chamber, determining a first time interval between the pacing pulse and a sensed event in a second heart chamber, determining a capture detection window in response to the determined first time interval, and enabling a capture detection module to iteratively decrease a pacing pulse magnitude delivered in the first heart chamber until an event in the second heart chamber is not sensed during the determined capture detection window.

Abstract translation: 描述了用于促进选择用于心脏室的起搏矢量的各种技术。 所描述的一个示例性方法包括：对于多个向量中的每一个，递送起搏脉冲以捕获第一心室，确定起搏脉冲与第二心室中的感测事件之间的第一时间间隔，确定第二心室中的捕获检测窗口 响应于确定的第一时间间隔，并且使得捕获检测模块能够迭代地减少在第一心室中递送的起搏脉冲幅度，直到在确定的捕获检测窗口期间没有感测到在第二心室中的事件。