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System and process for monitoring myocardial integrity

  • US 4,562,846 A
  • Filed: 09/15/1983
  • Issued: 01/07/1986
  • Est. Priority Date: 09/15/1983
  • Status: Expired due to Term
First Claim
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1. A process for the on-line monitoring of the viability of myocardial tissue of a patient during and after a surgical procedure comprising the steps of:

  • implanting multiple electrodes in said tissue prior to said surgical procedure;

    sensing the instantaneous unipolar electrical potentials of said electrodes prior to said surgical procedure;

    registering the peak-to-peak voltage values of said instantaneous unipolar electrical potentials for a period of time occurring prior to said surgical procedure for each of said electrodes which have a negative slope exceeding a predetermined valueperforming said surgical procedure;

    sensing the instantaneous unipolar electrical potentials which have a negative slope exceeding said predetermined value of each of said electrodes during and after said surgical procedure;

    comparing said registered values for each of said electrodes with said sensed potentials during and after surgery for each of said electrodes; and

    providing an output indication of injured tissue when said registered values exceed said sensed potentials during and after surgery by a predetermined amount for at least one of said electrodes.

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