Analog Computer Analysis of Spatial Vectorcardiogram : Spatial Magnitude, Velocity and Acceleration Electrocardiograph and its Clinical Applications

Abstract

The spatial magnitude, velocity and acceleration electrocardiograph, an analog computer specially designed for on line and real time analysis of spatial vectorcardiograms, were introduced and evaluated for clinical applications. Spatial magnitude, velocity and acceleration of vectorcardiographic loops were automatically recorded. Definite normal patterns were observed for these tracings and they changed in characteristic ways in various pathologic situations. Spatial velocity electrocardiograms could diagnose abnormal ventricular depolarization in cases whose standard electrocardiograms were not diagnostic. The importance of "abnormal velocity of spatial T loop" was stressed as a parameter of myocardial damage.