Quantitative Interpretation of the Exercise Electrocardiogram

Publisher Website
Google Scholar
Abstract
This report describes a system of quantitating ecg changes after exercise which utilizes a special purpose analog computer (integrator) and calculation of mean VCG [vectorcardiogram] parameters by digital computer. Synchronizing circuitry automatically adjusts the period of integration for changes of heart rate. The vectorcardiographic response to stress of a group of patients with mild symptomatic coronary disease is compared to a normal control group. Highly significant changes in the direction of the T vector appear 3 min. after exercise and allow separation of normal subjects from patients with coronary disease. The quantitative output of this system is being used in an epidemiological approach to the problem of coronary disease in the aviator.