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2. 发明授权

US5417714A DDI pacing with PVC-protected hysteresis and automatic AV interval adjustment 失效
标题翻译： DDI起搏带有PVC保护滞后和自动AV间隔调整
公开(公告)号：US5417714A
公开(公告)日：1995-05-23
申请号：US60765
申请日：1993-05-11
申请人： Paul A. Levine , Malcolm Clarke , John W. Poore , Jason A. Sholder
发明人： Paul A. Levine , Malcolm Clarke , John W. Poore , Jason A. Sholder
IPC分类号： A61N1/365 , A61N1/362 , A61N1/368 , A61N1/36
CPC分类号： A61N1/368 , A61N1/3622 , A61N1/3682
摘要： A dual-chamber pacemaker provides DDI pacing with PVC-protected hysteresis and automatic AV interval adjustment. An extended hysteresis atrial escape interval (AEI.sub.H) is invoked in response to the occurrence of either an atrial paced event followed by a sensed R-wave (an AR event), or an atrial sensed event followed by a sensed R-wave (a PR event). The occurrence of a premature ventricular contraction (PVC) thus does not trigger AEI.sub.H. In one embodiment, AEI.sub.H is not invoked unless the sensed AR or PR interval exceeds a prescribed reference interval. In a further embodiment, the AV interval (AVI) associated with the DDI operation is automatically shortened following an atrial stimulation pulse (A-pulse) delivered upon the timing-out of the AEI.sub.H. The shortened AVI is maintained for a programmed number of cycles of DDI operation, after which a lengthened AVI is reestablished for one cycle. If AV pacing follows after using the lengthened AVI, then the shortened AVI is reinstated for a second number of programmed cycles of DDI operation. If AR pacing follows after using the lengthened AVI, signifying intact AV nodal conduction, then the AVI is lengthened to the programmed AVI over a prescribed number of cycles.
摘要翻译：双室心脏起搏器为DDI起搏提供PVC保护的滞后和自动AV间隔调整。响应于发生心房起搏事件，随后是感测到的R波（AR事件）或心房感测事件，随后是感测的R波（PR），调节延长的心房逸出间隔时间（AEIH）事件）。因此早期心室收缩（PVC）的发生不会引发AEIH。在一个实施例中，除非感测到的AR或PR间隔超过规定的参考间隔，否则AEIH不被调用。在另一个实施例中，在AEIH超时之后递送的心房刺激脉冲（A脉冲）之后，与DDI操作相关联的AV间隔（AVI）自动缩短。缩短的AVI维持编程的DDI操作周期数，之后延长的AVI重新建立一个周期。如果在使用延长的AVI之后进行AV起搏，则缩短的AVI将恢复DDI操作的第二个编程周期数。如果在使用延长的AVI后进行AR起搏，则表示完整的AV节点传导，则AVI在规定数量的周期内延长到编程的AVI。

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