Barold S Serge, Lau Chu-Pak, Tse Hung-Fat, Hess Michael
Tampa General Hospital, 5806 Mariner's Watch Drive, Tampa, FL 33615, USA.
J Interv Card Electrophysiol. 2003 Aug;9(1):29-34. doi: 10.1023/a:1025316419920.
We studied the Medtronic Thera and Kappa 400 dual chamber pacemakers to determine the causes and mechanism of shortening of the sensed AV delay during normal sinus rhythm. When the sensed AV delay shortens to less than its programmed value, it lengthens gradually and returns to its programmed duration after a number of pacing cycles. This behavior is linked to the relatively slow automatic mode switching algorithm (AMS) and was observed when a transient increase in the sensed atrial rate failed to reach the point where AMS was activated and also upon exit from the AMS mode.
我们研究了美敦力Thera和Kappa 400双腔起搏器，以确定正常窦性心律期间感知到的房室延迟缩短的原因和机制。当感知到的房室延迟缩短至低于其程控值时，它会逐渐延长，并在多个起搏周期后恢复到其程控持续时间。这种行为与相对较慢的自动模式转换算法（AMS）有关，并且在感知到的心房率短暂增加但未达到激活AMS的点时以及从AMS模式退出时均观察到。
