METHOD TO PREVENT PACEMAKER INDUCED NON-REENTRANT VA SYNCHRONY USING ADAPTIVE ATRIAL PACING OUTPUT,申请号WO2003US18329-传众专利搜索

METHOD TO PREVENT PACEMAKER INDUCED NON-REENTRANT VA SYNCHRONY USING ADAPTIVE ATRIAL PACING OUTPUT

申请公布号：WO03103767(B1)

申请号：WO2003US18329

申请日期：2003.06.10

申请公布日期：2004.03.04

申请人：

MEDTRONIC, INC.

发明人：CASAVANT, DAVID, A.;SWEENEY, MICHAEL, D.;BETZOLD, ROBERT, A.

分类号：A61N1/362;(IPC1-7):A61N1/368

主分类号：A61N1/362

摘要：The present invention is directed to the problem of preventing episodes of "AV Desynchronization Arrhythmia" (AVDA), a dual-chamber pacing behavior that is initiated by a PVC or other ventricular event that is not closely preceded by an atrial depolarization event. If the initiating PVC creates retrograde conduction resulting in an atrial refractory-sensed event, and should the succeeding AP fail to capture due to pacing within the atrial (physiological) refractory period (ARP) a repetitive AVDA pattern (of APineffectual - VP - ARrefractory) can persist for an extended period of time during which symptoms of pacemaker syndrome can occur. According to the present invention, after detection of AVDA, the following may occur: an dynamically increased magnitude of delivered atrial pacing energy, a delay interval may be increased to allow the atrial myocardial tissue to recover, a pacing modality mode-switch, a patient notification, record or process a histogram, and/or a combination thereof may be used in response to detection of a deleterious AVDA sequence.