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Technique to evaluate myocardial ischemia from ECG parameters

  • US 4,930,075 A
  • Filed: 06/06/1988
  • Issued: 05/29/1990
  • Est. Priority Date: 07/13/1987
  • Status: Expired due to Fees
First Claim
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1. A method of evaluating a patient for ischemia by evaluation of an electrocardiogram of that patient and specifically an ST segment thereof, comprising the steps of taking an electrocardiogram of the patient, digitizing the electrocardiogram, determine length of said ST segment, estimating a critical threshold value in said electrocardiogram as a function of the length of the ST-segment of said electrocardiogram, calculating a value representing ST-segment depression relative to a fixed baseline based on signal information representing said baseline and said ST-segment to transform signals representing the ST-segment morphology into signals representing an equivalent horizontal morphology, and comparing said signals representing said equivalent horizontal morphology to said threshold value, where morphologies exceeding said threshold are labelled ischemic.

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