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Abstract
Orthogonal electrocardiograms (axial lead systerm), phonocardiograms, and indirect carotid arterial pulse tracings were recorded on 602 normal people and 44 with cardiovascular disease. From these recordings, time of systole (QS2), left ventricular ejection time (LVET), and preejection period (PEP) were measured. There was no significant difference between the normal individuals and patients in QS2 or reclining heart rate but LVET tended to be shorter and PEP longer in the patients. These differences persisted when LVET and PEP were corrected for heart rate. However, as there was much overlap of the values for normals and patients, the differences between the two groups were not marked.