In an atrial pacing system, the A-PACE pulse energy, defined by the pulse width and pulse amplitude, sufficient to reliably capture the atrium without being wasteful of battery energy is periodically determined in accordance with atrial capture management (ACM) algorithms. The ACM algorithms allow a...http://www.google.co.uk/patents/US7130690?utm_source=gb-gplus-sharePatent US7130690 - Atrial capture management during atrial and ventricular pacing