Patent ID: 7027866
Filing Date: 2006-04-11
Classification: A61N

Abstract:
1. A method of hemodynamically optimizing pacing intervals in a cardiac stimulation therapy device that provides pacing therapy to at least three chambers of a heart, comprising: a) measuring developing fluid pressure with a pressure sensor adapted to be coupled to a cardiac chamber and providing a pressure signal therefrom for at least one cardiac cycle; b) storing at least a one of 1) the pressure signal or 2) a temporal derivative of the pressure signal, and a then-present pacing interval set used when the pressure signal was measured; c) changing at least two pacing intervals of said pacing interval set, and d) returning to step a) until each of the at least two pacing intervals have been changed; e) comparing the stored pressure signal or the temporal derivative of the pressure signal corresponding to said at least two pacing intervals to the stored pressure signal or the temporal derivative of the pressure signal corresponding to; and f) utilizing a present pacing interval set that includes the at least two pacing intervals that provided the most favorable pressure signal or temporal derivative of the pressure signal when compared in step e), wherein the pressure sensor comprises an absolute pressure sensor coupled to an ambient pressure reference unit.