Practical, handy guide to ECG interpretation, designed for medical students and foundation doctors on the go and highly affordable for those rotating through modular courses or working on attachment. Highly affordable price and convenient pocket size format fits in back pocket. 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. Clinical disorders illustrated by a full page 12 lead ECG with brief accompanying text on facing page that clearly identifies the defining feature of the ECG (in other words, what is it that makes this atrial fibrillation?). Focus on the conditions that medical students and foundation doctors are most likely to see and be tested on.