Intraventricular Conduction Disturbances

Rhythm was the first expression of cardiac activity which fell under man''s obser­ vation, and the heart beat has always represented the very essence of life itself as it accelerates or slows during moments of rest, effort, joy and pain until it comes to a halt at the moment of death. Undoubtedly the heart beat was, for a considerable time, the only semiological element by which man could interpre...