This clinically-orientated book shows how the electrocardiogram is used to aid the diagnosis of patients with cardiovascular disease. Each chapter begins with a brief consideration of the history and examination of the patient to assist the doctor plan how to use the ECG in the most intelligent and profitable way. The text explains the variations in the patterns of ECGs which are seen in both healthy people as well as those with cardiac problems, and illustrates the abnormalities with a comprehensive range of examples. A new page size and text design gives a much clearer presentation of the ECGs, allowing full traces to be presented on one page A new chapter on electrophysiology and electrical devices responds to the increasing occurrence of pacemakers and implanted defibrillators in patients The "What to do" sections at the end of chapters have been fully updated