Electrocardiogram (ECG)

Key facts An ECG is a simple, painless test that measures your heart’s electrical activity. Your doctor may recommend an ECG if you have symptoms such as chest pain or a racing heart. If your ECG is abnormal, you may need further tests or treatment. What is an ECG? An ECG is a graph of your heart’s electrical activity. It’s a simple, safe and painless test. There’s no risk of being electrocuted. Why do I need an ECG? Your doctor may recommend an ECG if you have chest pain, a racing heart or other heart problems. An ECG can show if