Patent ID: 8452401

Claim:
A method for delivering anti-tachyarrhythmia therapy, comprising: generating an electrogram signal representing electrical activity in a cardiac chamber; detecting chamber senses and measuring a time interval between such senses to determine a current heart rate; detecting a tachyarrhythmia when the heart rate exceeds a specified tachycardia detection rate (TDR); upon detection of a tachyarrhythmia, delivering shock therapy if the heart rate is above a fibrillation detection rate (FDR); upon detection of a tachyarrhythmia below the FDR, delivering a sequence of different therapies where the sequence is stopped whenever the tachyarrhythmia is terminated; recording the successes and failures of each therapy of the sequence in terminating tachyarrhythmias for a plurality of heart rate ranges between the TDR and the FDR and computing a success/failure ratio for each therapy at each heart rate range; and, discontinuing a therapy from the sequence for a particular heart rate range if the success/failure ratio for a particular therapy at that particular heart rate range drops below a specified threshold value.