Patent ID: 7844331

Claim:
A cardiac rhythm management (CRM) system, comprising: a sensing circuit to sense at least one cardiac signal; a tachyarrhythmia detector, coupled to the sensing circuit, to detect a cardiac cycle length from the at least one cardiac signal and detect a tachyarrhythmia episode using the detected cardiac cycle length; a hemodynamic sensor to sense a hemodynamic signal indicative of hemodynamic performance; a hemodynamic parameter detector, coupled to the hemodynamic sensor, to detect a hemodynamic parameter from the hemodynamic signal; a pacing circuit to deliver pacing pulses; a therapy controller coupled to the tachyarrhythmia detector, the hemodynamic parameter detector, and the pacing circuit, the therapy controller including: a therapy selector adapted to compare an arrhythmic value of the hemodynamic parameter detected during the detected tachyarrhythmia episode to a normal range of the hemodynamic parameter and to select an anti-tachyarrhythmia pacing (ATP) algorithm in response to the arrhythmic value of the hemodynamic parameter falling within the normal range of the hemodynamic parameter and a cardioversion/defibrillation algorithm in response to the arrhythmic value of the hemodynamic parameter falling out of the normal range of the hemodynamic parameter; a characteristic feature detector adapted to detect a predetermined type morphological feature of the hemodynamic signal, the predetermined type morphological feature temporally associated with an aortic valve closure and a pulmonary valve closure; and an ATP controller, coupled to the therapy selector and the characteristic feature detector, to control the delivery of the pacing pulses by executing the selected ATP algorithm, the ATP controller adapted to select the detected predetermined type morphological feature as a beginning point of an ATP window and initiate a delivery of a burst of the pacing pulses within the ATP window to interrupt a reentrant loop causing the tachyarrhythmia.