Patent ID: 7558626

Claim:
A method for providing cardiac resynchronization therapy comprising: measuring an interval between an atrial depolarization and an intrinsic ventricular depolarization; delivering pacing pulses to a left ventricle of a heart at pacing intervals determined based on the measured interval between the atrial depolarization and the intrinsic ventricular depolarization; measuring a characteristic of an electrogram signal representing signals within the heart; and selecting one of the pacing intervals based on the measured characteristic of the electrogram signal representing signals within the heart, wherein measuring a characteristic of an electrogram comprises measuring a plurality of QRS complex widths and a plurality of Q-T intervals, each of the QRS complex widths and each of the Q-T intervals corresponding to a respective one of the delivered pacing pulses, and wherein selecting one of the pacing intervals comprises: identifying a first one of the pacing intervals that corresponds to a smallest one of the QRS complex widths; identifying a second one of the pacing intervals that corresponds to a largest one of the Q-T intervals; and determining an average of the first and second pacing intervals.