This monograph is devoted to practical electrocardiography and its role in clinical diagnosis. Fundamentals of electrophysiology of the heart and theoretical concepts pertinent to the interpretation of the electrocardiogram are dealt with in two initial sections that include a general discussion of vectorcardiography. According to the authors, this method is merely a research tool that cannot replace conventional electrocardiography in practice. The subject is presented in an original and didactically excellent way. The book is divided into three main sections: the first dealing with electrocardiographic syndromes, the second with heart diseases classified as to cause, and the third with cardiac arrhythmias. Each section contains a concise text with cross references to representative electrocardiograms assembled at the end of its subdivisions. The tracings are explained in extensive legends that also give clinical data, autopsy findings, and a final critical evaluation of the importance of the electrocardiogram in each case.