Understanding the ECG. Part 7: Chamber enlargement

This document is the Accepted Manuscript version of a Published Work that appeared in final form in British Journal of Cardiac Nursing, copyright © MA Healthcare, after peer review and technical editing by the publisher. To access the final edited and published work see 10.12968/bjca.2016.11.5.230 In this seventh part of our ECG series, we briefly revisit our structured ECG interpretation tool before turning our attention to chamber enlargement. We discuss why chamber enlargement occurs, and describe how it can be recognised on the ECG using a variety of criteria. We also consider the limitations of using the ECG to screen patients for chamber enlargement, and examine the sensitivity and specificity of published criteria.