Since the publication of the 3rd Edition 17 years ago, progress has been truly remarkable in all areas of electrocardiography. Five of the seven chapters in this 4th Edition have been extensively revised. Out of the total of 125 ECGs, 65 are new. Each ECG is crisp and clear and all the abnormalities are highlighted by arrows for easy recognition and understanding. This book is the culmination of the author's 45 years of experience in the teaching of electrocardiography to coronary care unit nurses, medical undergraduates, postgraduates, interns, residents, senior residents and above. As the title of the book implies, the approach to the subject has been entirely from the viewpoint of a clinician. Hence, clinical-electrocardiographic correlations have been emphasized simply and succinctly throughout the text.