is a test that evaluates the electrical activity of the heart by monitoring and recording it over a 24-hour period as the patient goes about his or her normal activities.

A Holter monitor continuously records the heart’s electrical activity, usually over 24 hours, while the patient goes about normal activities. Coronary catheterization examines the heart’s blood vessels, an electrophysiology study evaluates electrical pathways in a clinical setting, and a heart biopsy takes a tissue sample. Therefore, the correct choice is a Holter monitor.

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