Patent ID: 7797037
Filing Date: 2010-09-14
Classification: A61N

Abstract:
1. A method for enhanced tachycardia detection, the method comprising: sensing an atrial electrogram and a ventricular electrogram; measuring atrial intervals based on the sensed atrial electrogram and ventricular intervals based on the sensed ventricular electrogram; detecting a tachycardia based on one or more intervals of the measured ventricular intervals; executing a rate accuracy enhancement algorithm to select at least a set of atrial intervals from the measured atrial intervals and a set of ventricular intervals from the measured ventricular intervals, the executing including determining a size of the set of atrial intervals and a size of the set of ventricular intervals based on a heart rate; calculating at least one average atrial rate based on the selected set of atrial intervals and one average ventricular rate based on the selected set of ventricular intervals; and classifying the detected tachycardia as ventricular tachycardia (VT) if the at least one average ventricular rate is higher than the at least one average atrial rate by a predetermined margin.