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Illustrative Electrocardiography

JAMA. 1940;115(12):1045-1046. doi:10.1001/jama.1940.02810380075038.
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This edition, like the preceding one, is based on a description of illustrative electrocardiograms. In this edition the author has added the subject of chest leads and included a verbatim copy of the report of the American Heart Association Committee on precordial leads. The method of presenting the electrocardiograms is commendable, and it is regrettable that a large number of errors nullify its usefulness. The following are some of the typical errors:

Plate 17 shows a sinus arrhythmia with nodal escape and dissociation and not a wandering pacemaker. It is questionable whether the attempt to locate the origin of the premature systole as stated on page 49 is correct. In plate 20 the author mistakes a sinus P wave occurring at the proper time for a premature P wave. In plate 21 the author overlooks a pulsus trigeminus. In plate 22 the author fails to draw attention to the effects


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