This is a handbook of electrocardiography for the practicing physician without special training in this field of medicine. Professor Rothberger in an introductory note recommends the book for its usefulness to this group of physicians, more of whom, he believes, should employ the electrocardiograph. The conservatism in the evaluation of evidence of cardiac damage is indicated by the fact that the author does not mention the doubtfully significant minor changes, by his clear definition of normal variations, by his correlation of the electrocardiographic findings with clinical symptoms and signs and by his emphasis on the uncertainty of the prognostic value in the individual case. This conservatism is desirable because it should help the practicing physician avoid the usual mistakes of those inexpert in this field.
The major part of the volume is concerned with the arrhythmias. Dressler recognizes the present predominant interest in the evidence of myocardial damage apart from