A system and method of providing for cardiac pacing which incorporates modulation of the pacing rate in order to minimize variations in ventricular power output, e.g., variation related to patient respiratory phases. In a preferred embodiment, pacing rate is increased during inspiration relative to expiration,...http://www.google.de/patents/US6141590?utm_source=gb-gplus-sharePatent US6141590 - System and method for respiration-modulated pacing
