This book is based on the experience of the author in teaching courses of electrocardiography and therefore reflects a rather dogmatic, but at the same time limited, discussion of the principles and facts of electrocardiography. Undoubtedly, the book is clearly written, systematic in its organization, reads easily, and is quite well illustrated. It has derived most of its information from other sources and the best illustrations from these publications in the literature have been reproduced to the advantage of the reader who now finds essentials of other people's work.