Patent ID: 7653431
Filing Date: 2010-01-26
Classification: A61B,G16H

Abstract:
1. A method of discriminating between supraventricular and ventricular tachyarrhythmia, comprising: obtaining a plurality of cardiac templates from supraventricular cardiac waveforms and associating the plurality of cardiac templates with a plurality of cardiac rates to provide a plurality of rate-indexed templates; detecting a tachyarrhythmia episode of a patient; determining an episode cardiac rate for the detected tachyarrhythmia episode; identifying a closest cardiac rate from the plurality of cardiac rates that is closest to the episode cardiac rate; initially selecting from the plurality of rate-indexed templates an initial template associated with the closest cardiac rate; classifying the tachyarrhythmia episode as supraventricular tachyarrhythmia or ventricular tachyarrhythmia based on one or more templates selected from the plurality of rate-indexed templates, staffing with the initial template; creating supraventricular tachyarrhythmia in the patient by atrial pacing at multiple pacing rates; sensing cardiac waveforms during the created supraventricular tachyarrhythmia; and determining if the patient's supraventricular rhythm exhibits rate dependent morphology based on morphologies of the cardiac waveforms.