New edition of the best-selling title that breaks down a complex and daunting subject using clearly-labelled, full-page ECG traces and concise but informative text. Revised text and brand-new ECG traces bring the new edition fully up-to-date. New chapters cover electrolyte and homeostatic disorders, and normal variants. Logical, sequential content: relevant basic science, then a guide to understanding a normal ECG and the building blocks of an abnormal ECG, before describing clinical disorders.