Patent ID: 7610088

Claim:
A method for monitoring left ventricular function during delivery of a cardiac resynchronization therapy (CRT), comprising: deploying a motion sensor to a fixed location on a portion of a left ventricular lateral wall wherein the motion sensor generates a motion signal proportional to motion of the portion of the left ventricular lateral wall; opening a data collection window during a portion of a selected cardiac cycle phase; storing the motion signal throughout at least a part of the portion of the data collection window for a predetermined time interval or for more than one cardiac cycle; verifying a heart rate stability characteristic during the predetermined time interval or for more than one cardiac cycle averaging the stored motion signal; determining a signal characteristic from the averaged stored signal that is representative of left ventricular function; and delivering a cardiac resynchronization therapy (CRT) based at least in part upon the signal characteristic; wherein the motion sensor consists of one from the group: a piezoelectric sensor, an optical sensor, a Hall-effect type sensor, a capacitive sensor, a resistive sensor, an inductive sensor.