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May 21, 1955

Diagnostic électrocardiographique

JAMA. 1955;158(3):237. doi:10.1001/jama.1955.02960030087032

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In this new and revised edition the authors have concentrated on a synopsis of present theories of electrocardiography and a demonstration of application of vectorial interpretation to practical electrocardiography. A section on disturbances of rhythm is presented in the conventional way. Principles of electrophysiology and vector analysis are taken up first; the theories are critically reviewed; and the methods and instruments used for recording the electrocardiograms are described in special chapters. Then the concepts of the authors are developed. These are based on their own animal experiments and comparative studies of scalar electrocardiograms with actual vectorcardiograms. Interpretation of abnormalities of P, QRS, and T waves in terms of alterations of the electrical field are illustrated in numerous diagrams. Cardiac strain, intraventricular block, and myocardial infarction are discussed at length. The alterations of the electrical field, as revealed by changes in the contour and direction of vector loops, are correlated with

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