Patent ID: 9643013
Date: 2017-05-09
CPC Classifications: A61B,A61N

Claim:
1. An apparatus for adjusting rate-adaptive atrioventricular (RAAV) pacing interval in a triple chamber cardiac resynchronization therapy (CRT) delivery device, comprising: means for measuring a heart rate change of a subject receiving pacing therapy from an implanted pacing device that includes an active rate-adaptive AV (RAAV) interval feature; means for determining an end of a P-wave (PWend) for an atrial depolarization; means for determining one of a beginning of a QRS complex (QRSbeg) and an end of the QRS complex (QRSend) accompanying the P-wave; and means for limiting adjustment of an operating AV interval by the RAAV interval feature to maintain a lower limit on time elapsed between PWend and one of the QRSbeg, the QRSend, and delivery of a ventricular pacing stimulus to preserve atrial-ventricular filling characteristics.