The purpose of this study was to determine left ventricular activation, dispersion of refractoriness, and total recovery time in patients with coronary artery disease and ventricular tachycardia and in patients with the long QT syndrome and to compare these patients with a group of normal patients. Left Patients and Methods Patient PopulationThe study population consisted of 18 patients. The mean age was 46 years with a range from 17 to 72 years. There were 10 men and eight women.

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