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High-Speed Cine-Electrocardiography
By JOSHUA J. FIELDS, LOUIS FIELDS, ELEANOR GERLAGH and MYRON PRINZMETAL
This paper describes a method of using the high-speed camera in medical research on heart disease. Normal and abnormal human and animal hearts are photographed at high speed simultaneously with the electrocardiograph recording, to ascertain and to study the conditions revealed by similar electrocardiograms of human patients.
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FNE OF THE most useful tools for studying the motion of the heart is the high-speed camera. For several years we have been taking slow motion pictures of the intact, beating heart of animals, before and after the experimental production of certain types of heart disorders. The magnification in time and detail has revealed much about the contraction not only of the whole heart but of the individual muscle fibres as well, in both normal and abnormal
Presented on October 10, 1952, at the Society's Convention at Washington, D.G., by Ethel Foladare for the authors. This work is from the Institute for Medical Research, Cedars of Lebanon Hospital, 4751 Fountain Ave., Los Angeles 29, Calif., and the Department of Medicine, University of California Medical School, Los Angeles, Calif. This study was aided by grants from the L. D. Beaumont Trust Fund, the Blanche May Memorial Fund, the Margaret Mayer Fund, L. Spitz, I. Berlin and E. Mannix.
cardiac conditions. Careful analysis of these motion pictures has yielded a great deal of information concerning the mechanism and nature of heart action.
However, the clinical diagnosis of heart disease depends to a great extent upon what the electrocardiographic tracing reveals. In order to apply what we learned from the motion pictures to patients with heart disease, it was necessary to correlate the mechanical events of the heart with the electrical events. This meant, of course, recording the heart motion and the electrical trace simultaneously, and on the same film. In this way, corresponding mechanical and electrical events could be analyzed. After many trials and errors, a suitable technique was devised.
Procedure and Equipment
Figure 1 illustrates diagrammatically the relative positions of the equipment used. The camera is focused directly
December 1952 Journal of the SMPTE Vol.59
493