This book is intended primarily for the doctor who is confronted with an electro cardiogram and who wishes to make his own interpretation rather than to rely entirely upon the report of a specialist. The clinical use of the electrocardiogram is the sole concern here and no attempt is made to describe electrophysiology. It is hoped that by beginning with a description of the P wave and its abnormalities the reader will gain confidence and the desire to continue to subsequent sections as he realizes the simplicity of the approach. In a further attempt towards clarity and ease of reading, the...