An electrocardiogram (ECG) is a quick and painless way to assess the rate, rhythm and electrical activity of the heart and also provides some information on the general health of the heart. It is a simple procedure involving lying down on a bed for 2-5 minutes with 10 stickers (electrodes) attached to your chest. A print out of the electrocardiogram ECG is provided, which can be read by the cardiologist during the clinic visit.