Overview

A Holter monitor is a small, wearable device that keeps track of your heart rhythm. Your doctor may want you to wear a Holter monitor for one to two days. During that time, the device records all of your heartbeats.

A Holter monitor test may be done if a traditional electrocardiogram (ECG) doesn't give your doctor enough information about your heart's condition.

Your doctor uses information captured on the Holter monitor to figure out if you have a heart rhythm problem. If standard Holter monitoring doesn't capture your irregular heartbeat, your doctor may suggest a longer-term monitor, which can record your heartbeat over several weeks.

Some personal devices, such as smartwatches, offer electrocardiogram monitoring. Ask your doctor if this is an option for you.