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Energy saving cardiac pacemaker

  • US 4,979,507 A
  • Filed: 05/03/1989
  • Issued: 12/25/1990
  • Est. Priority Date: 05/10/1988
  • Status: Expired due to Term
First Claim
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1. The method of controlling a battery operated cardiac pacemaker implant to produce low energy pacing stimulus pulses at an implanted heart stimulus electrode to conserve battery power, comprising in combination the steps of:

  • performing threshold measurements at at least two different stimulus pulse energy levels at the implanted electrode of a particular patient and organizing said stimulus pulses into effective and ineffective energy levels for producing heartbeats,determining from the threshold measurements an individual energy threshold characteristic for the particular pacemaker system and patient under test by calculating from said different energy level measurements a substantially most energy efficient stimulus pulse in the implanted pacemaker effective to stimulate the heart,adjusting the energy efficient stimulus pulse to the technical capability of the particular pacemaker for operating that pacemaker with a modified optimum energy stimulus pulse exceeding the minimum energy threshold by a predetermined safety margin, andproducing in the pacemaker said modified stimulus pulse, thereby operating the pacemaker at reduced battery energy drain.

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