Abstract
The case presented is the third to be published with electrocardiograms recorded during anomalous atrioventricular excitation before and after myocardial infarction. It is proposed that there are seven possible components to ventricular depolarization during anomalous atrioventricular excitation after myocardial infarction. A method of vector analysis is presented which permits selective vectorial cancellation of these components when they are manifested in two or more separate electrocardiograms. The characteristics of the four components which form the basis for the recognition of myocardial infarction are described. The case presented is analyzed, and it is concluded that study of the ventricular depolarization loops for the electrocardiograms taken during anomalous atrioventricular excitation permits the recognition of the occurrence of an acute inferoseptal myocardial infarction. Analysis of the ST-T waves leads to the same conclusion. Analysis of an electrocardiogram taken during normal atrioventricular excitation appears to confirm the conclusions.
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