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March 9, 1940

The Electrocardiogram and X-Ray Configuration of the Heart

JAMA. 1940;114(10):915. doi:10.1001/jama.1940.02810100081032

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This monograph sets out to demonstrate that the electrocardiographic appearance is determined to a large extent by the contour, size and position of the heart in the chest. The author clearly demonstrates that considerable variations in the electrocardiogram can be caused in these ways and that the effect of these other factors must be excluded before the interpretation is made that an underlying myocardial disease exists. The monograph will be illuminating to those few cardiologists who tend to read into the electrocardiogram evidences of myocardial disease when they are not present. The subject matter has recently received new impetus and is becoming more and more widely recognized and, as the author states, the type of body structure, the position of the patient and the location of the heart in the chest must all be considered in arriving at an interpretation of a particular record. The development of each topic is

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