Learning about ECG interpretation from books such as 'The ECG Made Easy' or 'The ECG in Practice' is fine so far as it goes, but it never goes far enough. As with most of medicine there is no substitute for experience, and to make the best use of the ECG there is no substitute for reviewing large numbers of them, seeing them in the context of the patient from who they were recorded, learning to appreciate the variations both of normality and of...