The Rectilinear Vectorcardiogram in Coronary Insufficiency

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Abstract
A description is given of the apparatus and method employed in obtaining a rectilinear vectorcardiogram. With this method, the cardiac action current is transmitted by air before, during and after exercise, and the direction and magnitude of spatial vectors are clearly displayed with respect to time. Cardiac rotation has only a minimal effect on the magnitude of the spatial vector, as compared to the effects seen when a single lead is employed; therefore, the spatial magnitudes of the S-T segment vectors before and after exercise reflect primarily the presence or absence of coronary insufficiency. Because of this, the method appears to be well suited for the detection and evaluation of coronary insufficiency in its early stages.