Book excerpt: This comprehensive book fully explains the use and implications of the electrocardiograph, an invaluable tool to assess cardiac function. It includes a thorough assessment of the functions of the ECG and its clinical implications. This useful book can be used by physicians, nurses, medical students, exercise physiologists, cardiac technicians, paramedics, and physician assistants to monitor cardiac function. It includes detailed explanations of arrhythmias using a consistent, logical step-by-step approach that includes practice and self-assessment activities. This book provides a thorough study of the ECG, the window to the heart's function.