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In the second edition of his well-known textbook, the distinguished European author, a pioneer in application of vectorial analysis to clinical electrocardiography, has achieved an excellent result by combining his own studies with those of investigators within and outside his country, including very recent ones. Many of the views presented in the first edition and now widely accepted form again the basis for the development of the subject and are fortified by additional and convincing diagrammatic illustrations. The author has accepted the conventional technique and terminology of precordial leads and has dropped the concept of proximity potentials in favor of the spatial vector loop as the dominating factor in the genesis of the precordial electrocardiogram. Several methods for determination of the origin and direction of instantaneous vectors are described, including a modification of Grant's method. The statement that a correlation of anatomic and electrical position "is impossible from the standpoint
Klinische Electrokardiographie: Lehrbuch für Studierende und Ärzte. JAMA. 1952;149(3):312. doi:10.1001/jama.1952.02930200098036