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Method and apparatus for improving the probability of success of defibrillation shocks

  • US 6,154,672 A
  • Filed: 12/14/1998
  • Issued: 11/28/2000
  • Est. Priority Date: 06/22/1998
  • Status: Expired due to Term
First Claim
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1. A method for delivering defibrillation therapy to a patient'"'"'s heart comprising the steps of:

  • (a) positioning a plurality of defibrillation electrodes in or near the patient'"'"'s heart;

    (b) attaching at least one sensor in a low gradient region of a ventricle of the patient'"'"'s heart;

    (c) monitoring the patient'"'"'s heart to detect the presence of a heart fibrillation;

    (d) acquiring a respective real time ventricular unipolar electrogram from each said at least one sensor;

    (e) monitoring each said electrogram until a percentage of greater than 50% of each said acquired electrogram is detected to be simultaneously in downstroke; and

    (f) delivering a defibrillation shock to said heart fibrillation immediately upon the occurrence of step (e) effective to terminate fibrillation.

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