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Although vectorcardiograms have been recorded directly since 1930, they have received increasing attention since they help explain the obscure phenomena in the conventional electrocardiogram as well as to provide additional diagnostic information of their own. Paul Lichtlen decided to utilize "the existing rich material from the vector-electrocar-diographic laboratory of the University Medical Clinic in Zürich [where he is director]... for a monograph... with the recognition that the interpretation of the pathological excitation of the heart revealed by the electrocardiogram is frequently difficult... because of the lack of recognition of the basic underlying vectorial events." After several years of intensive study of over 4,000 vectorcardiograms, he has correlated the clinical and vectorcardiographic findings with results of cardiac catheterization and angiocardiography. His monograph approaches clinical vectorcardiography broadly but with major emphasis on myocardial infarction, ventricular hypertrophy, and interventricular heart-block (bundle-branch block). Only 25 pages are devoted to the
Wehrmacher WH. Klinische Vektor Elektrokardiographie.. Arch Intern Med. 1970;125(6):1085-1086. doi:10.1001/archinte.1970.00310060163036