Titles in the Pocket Tutor series give practical guidance on subjects that medical students and foundation doctors need help with 'on the go', at a highly-affordable price that puts them within reach of those rotating through modular courses or working on attachment. Topics reflect information needs stemming from today's integrated undergraduate and foundation courses: * Common presentations * Investigation options (e.g. ECG, imaging) * Clinical and patient-orientated skills (e.g. examinations, history-taking) The highly-structured, bite-size content helps novices combat the 'fear factor' associated with day-to-day clinical training, and provides a detailed resource that students and junior doctors can carry in their pocket. Key points * 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.