| 摘要 |
A dual chamber pacemaker system and method are provided for HOCM and like pacing therapy, with the feature of searching or scanning values of AV escap e interval to define an optimized value at about the longest AV escape interva l value consistent with full capture in response to a delivered ventricular pa ce pulse. In a preferred embodiment of the invention, the system and method sen se and process FFRS signals derived from the atrial lead and otherwise, and obtain therefrom a characteristic which is evaluated for a determination of optimized AV escape interval. In one specific embodiment, the time durations between delivered ventricular pacing pulses and resulting FFRS signals are analyzed as a function of AV escape interval, and the optimized AV escape interval is chosen at about the longest AV escape interval corresponding to the longest such time duration, i.e., at about the knee of the FFRS time duration vs. AV escape internal curve. In another embodiment the FFRS characteristic utilized is duration, and the system determines the longest A V escape interval corresponding to the highest duration value. The system and method can be utilized either with an external programmer or can be adapted to operate automatically in an implanted pacemaker.
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