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loginThis book is an introduction to electrocardiography. It is written particularly for medical students, house staff, and nurses, and it assumes no previous instruction in ECG reading. The book has been widely used in introductory courses on the subject. Clinicians wishing to review basic electrocardiography have also found it useful. This new edition is divided into four parts. Part 1 covers the basic principles of electrocardiography, normal ECG patterns, and the major abnormal depolarization (P-QRS) and repolarization (ST-T-U) patterns. Part 2 describes the major abnormalities of heart rhythm and conduction. Part 3 presents an overview and review of the material. Part 4 is primarily a set of unknowns for review and self-assessment. In addition, practice questions are presented at the end of almost all chapters. In reading ECGs, as in learning a new language, fluency is attained only with repetition and review. The clinical applications of ECG reading have been stressed throughout the book. Each time an abnormal pattern is mentioned, the conditions that might have produced it are discussed. Although the book is not intended to be a manual of therapeutics, general principles of treatment and clinical management are briefly discussed. Separate chapters are devoted to important special topics, including electrolyte and drug effects, cardiac arrest, the limitations and uses of the ECG, and electrical devices, including pacemakers and implantable cardioverter defibrillators (ICDs).