Patent ID: 7162300

Claim:
An implantable cardiac pacing device, comprising: ventricular pacing means for pacing the patient's ventricle with pace pulses at an adaptable pacing interval; AT means for determining AT and for determining the timing of the start of an AT episode; train means for delivering an ATP train in fixed relation to said AT start; algorithm means activated at said start of an AT episode for determining if ventricular pace pulses can be delivered following a said AT start with an adapted pacing interval whereby a synchronized ventricular pace pulse will be delivered synchronized to the last atrial pulse of a said AT train that has been delivered, said determining including determining said adapted pacing interval subject to predetermined pacing interval and AV criteria; temporary means for temporarily changing the pacing interval to said adapted value when it is determined that a said adapted pacing interval can be determined; wait means operative if said algorithm means determines that a said synchronized pace pulse cannot be delivered for activating said algorithm means after waiting for sensing of another atrial beat; and initiating means for initiating said train means to deliver a said ATP train upon a said pacing interval determination that a synchronized ventricular pace pulse can be delivered.