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IMPLANTABLE MEDICAL DEVICE WITH OPTIMIZATION PROCEDURE

  • US 20090254139A1
  • Filed: 04/13/2006
  • Published: 10/08/2009
  • Est. Priority Date: 04/13/2006
  • Status: Abandoned Application
First Claim
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1. An implantable medical devicea pulse generator that emits cardiac stimulating pacing pulses at least one lead comprising electrodes for delivering said pulses to cardiac tissue in at least one ventricle of a heart of a patient;

  • an acoustic sensor that detects acoustic energy in the patient and that emits a sensed signal corresponding thereto;

    a signal processing circuit configured to extract a signal corresponding to a second heart sound (S2) from the sensed signal, said signal being received from said acoustic sensor, and to produce signals indicative of second heart sounds of the heart of said patient over predetermined periods of a cardiac cycle during successive cardiac cycles, and to determine a duration of successive second heart sound signals; and

    a controller configured to perform an optimization procedure that controls delivery of said pacing pulses based on the determined durations of successive second heart sound signals to identify a combination of stimulation intervals including at least one of a AV interval and a VV interval that causes a substantially synchronized closure of the aortic and pulmonary valves.

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