An electrocardiogram is a painless, noninvasive way to help diagnose many common heart problems in people of all ages. It is used to determine or detect:
You may need an ECG if you have any of the following signs and symptoms:
A Holter monitor is a small, wearable device that records a continuous ECG, usually for 24 to 48 hours. It is a type of heart monitor that records your heart’s activity. If you have an irregular heartbeat or heart palpitations, but an ECG didn’t detect anything, a cardiac monitor can help diagnose the problem. You wear the Holter monitor while you do your daily activities. Your provider discusses the results with you.