An electrocardiogram is a very simple test performed at the bedside that can give loads of really valuable information about the heart. 12 lead ECGs are recordings of the electrical activity of the heart at the instant they are taken. The electrode stickers are placed in well-defined places on the chest, arms and legs so that ECGs are comparable between patients and over time on the same patient.

It is the first test a cardiologist will need and shows what rhythm the heart is in as well as sometimes showing evidence of heart muscle problems, previous heart attacks and much other information. Changes in an individual’s ECG over time are very important and can indicate that action is needed.