by Miles Witham, BMBCh, MRCP(UK), Clincal Lecturer in Aging and Health, Section of Aging and Health, Ninewells Hospital, Dundee
and Paramjit Jeetley, MBChB, MRCP(UK), Cardiology Research Registrar, Department of Cardiology, Northwick Park Hospital, Harrow
Adapted with permission from Crash Course: House Officer's Guide, Mosby 2004. |