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This atlas has the advantage of simplicity but the disadvantage of brevity. Its chief virtue, as pointed out in the foreword by Dr. Herrick, is that it places this method of study where it belongs: as a useful adjunct to the clinical examination. It may prove helpful to the student who wants a summary of the clinical application of electrocardiography; an important defect, however, is the lack of an account of precordial leads in general and their clinical application, as other precordial leads than the routine lead 4 sometimes establish the only clues to a clinical diagnosis. The booklet is simply and clearly printed aside from some defects in the reproduction of the illustrations, which are not always adequately inked, for example figure 39A.
The Clinical Value of Electrocardiography. JAMA. 1944;125(13):940. doi:10.1001/jama.1944.02850310060037