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This edition is a vast improvement over the first. It is much larger, better organized and more systematic. It is divided into five parts. The first part is devoted to principles and technic. In it has been included an excellent summary of chest leads which should help the reader to gain some insight into the recent developments. The description of the manner of interpreting electrocardiograms has been improved by bringing into this section some of the material in the appendix of the previous edition.
The second part deals with the wide variations in the contour of the normal electrocardiogram; included are many new illustrations with the three chest leads CF2, CF4 and CF5, which the authors now employ. The use of the term "most normal" and "least normal" to indicate uprightness of T waves in the chest leads is regrettable; it does not necessarily follow that a
Electrocardiography in Practice. JAMA. 1946;132(9):543–544. doi:10.1001/jama.1946.02870440057028