A cardiac pacemaker and a method of its use. The pacemaker paces a patient's heart in a tachyarrhythmia prevention pacing mode for an extended time period, defines a metric of success of the tachyarrhythmia prevention pacing mode, monitors the metric over the extended time period and, responsive to the...http://www.google.com/patents/US6185459?utm_source=gb-gplus-sharePatent US6185459 - Method and apparatus for prevention of atrial tachyarrhythmias
