Normal electrocardiogram: origin and description -- Atrial abnormalities -- Ventricular enlargement -- Left bundle branch block -- Right bundle branch block -- Other intraventricular conduction disturbances -- Acute ischemia: electrocardiographic patterns -- Myocardial infarction and electrocardiographic patterns simulating myocardial infarction -- Non-Q wave myocardial infarction, non-ST elevation myocardial infarction, unstable angina pectoris, myocardial ischemia -- Stress test -- Pericarditis and cardiac surgery -- Diseases of the heart and lungs -- Sinus rhythms -- Atrial rhythms -- Atrial flutter and atrial fibrillation -- Atrioventricular junctional rhythms -- Ventricular arrhythmias -- Torsade de pointes, ventricular fibrillation, and differential diagnosis of wide QRS tachycardias -- Atrioventricular block; concealed conduction; gap phenomenon -- Ventricular preexcitation (Wolff-Parkinson-White Sydrome and its variants) -- Effect of drugs on the electrocardiogram -- Electrolytes, temperature, central nervous system diseases, and miscellaneous effects -- T wave abnormalities -- QT interval, U wave abnormalities, and cardiac alternans -- Misplaced of leads and electrocardiographic artifacts -- Electrocardiography of artificial electronic pacemakers -- Ambulatory electrocardiography -- Normal electrocardiograms in the fetus, infants, and children -- Abnormal electrocardiograms in the fetus, infants, and children -- The electrocardiogram in congenital heart disease -- Cardiac arrhythmias in the fetus, infants, children, and adolescents with congenital heart disease.