3-dimensional graphic display of electrocardiograms

We developed a new method to display a potential distribution of the heart activity on the body surface. Electrocardiograms were recorded from many points distributed regularly on the precordial region. From these electrocardiograms three-dimensional graph of potential distribution was produced by a small digital computer and displayed on the CRT. This graph continuously changes with time according to change of potential distribution like an animation. An interpolation method that we had derived took a short execution time and give a smooth approximated curve. Three-dimentional graphs of electrocardiograms were produced for healthy male subjects. From these graphs a transmission of a wave front of the ventricular activation can be seen as if the wave moves over the picture.