Patent ID: 8060201
Filing Date: 2011-11-15
Classification: A61N

Abstract:
1. An implantable medical device comprising: a pulse generator configured to emit cardiac stimulating pacing pulses; a cardiac lead connected to said pulse generator and configured for placement relative to cardiac tissue of a patient to deliver said pacing pulses to said cardiac tissue; an acoustic energy sensor that senses acoustic energy in predetermined periods of a cardiac cycle during successive heart cycles of the patient, and that emits successive sensed signals respectively representing said acoustic energy in said predetermined periods during successive heart cycles; a signal processor supplied with said sensed signals and configured to extract an extracted signal representing the S a storage unit; and a controller in communication with said signal processor and said storage unit and said pulse generator, and being configured to operate said pulse generator to control emission of said cardiac stimulating pacing pulses from said pulse generator, said controller being configured to, at selected times, initiate an optimization procedure to iteratively modify emission of said cardiac stimulating pacing pulses to optimize an interval selected from the group consisting of a PV interval and a AV interval with respect to said energy value, by setting said interval to a first interval length and iteratively reducing said first interval length and storing, in said storage unit, successively extracted signals representing the S