Over the past 25 years I have rounded with countless numbers of wonderful house staff in the Coronary Care Unit. In the CCU and the wards, the electrocardiogram tells a story for each patient. From acute coronary syndrome, cardiomyopathy, hypertrophy, and electrolyte and drug toxicities, the electrocardiogram helps us link a patient's symptoms and exam findings with a diagnosis. Asking a house officer to not only describe the electrocardiogram, but interpret the findings is a particularly effective method of bedside teaching. I find that this method of electrocardiographic teaching helps house officers and students learn and remember important electrocardiographic findings. This book brings bedside electrocardiographic teaching to these pages. Everyone who enjoys clinical care will enjoy these ECG-based cases.