CARDIAC RESYNCHRONIZATION VIA LEFT VENTRICULAR PACING

摘要

The invention is directed to synchronizing delivery of pacing pulses to the left ventricle (22) with intrinsic right ventricular depolarizations. An interval between an atrial depolarization and an intrinsic right or left ventricular depolarization (134) is measured. A said plurality of left ventricular pacing intervals are tested and may be around said measured interval (134). One of the pacing intervals is selected (140) based on a measured characteristic of an electrogram that indicates ventricular synchrony such as QRS complex widths (116) and/or Q-T intervals (128). The implantable medical device (16) paces the left ventricle (22) based on the selected pacing interval (140).