Holter monitor - Mayo Clinic
https://www.mayoclinic.org/tests-procedures/holter-monitor/about/pac-20385039
WEB3 days ago · Overview. A Holter monitor is a small, wearable device that records the heart's rhythm, usually for 1 to 2 days. It's used to spot irregular heartbeats, also called arrhythmias. A Holter monitor test may be done if a traditional electrocardiogram (ECG or EKG) doesn't provide enough details about the heart's condition.
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