An ECG, or electrocardiogram, is a simple test that records the rhythm and electrical activity of the heart. It is commonly used to detect abnormal heart rhythms and investigate the cause of chest pains. It is important for clinicians to recognise and interpret ECG patterns accurately to ensure correct diagnosis and effective treatment. This fifth edition has been fully revised to provide the latest advances in ECG technology and its use in clinical diagnosis. Beginning with an overview of heart anatomy and physiology, the following chapters discuss the basics of reading an ECG, and normal and abnormal readings, covering most of the possible changes in ECG pattern that may be seen in daily practice. The final sections explain ECG interpretation and diagnosis of cardiac disorders. Enhanced by images of ECG readings, this new edition includes a comprehensive glossary and suggestions for further reading. Key points Fully revised, new edition providing latest advances in ECG technology In depth coverage of normal and abnormal readings Explains ECG interpretation and diagnosis of cardiac disorders in detail Features comprehensive glossary and suggestions for further reading.