Holter Monitor

A Holter monitor is a small device that records the electrical activity of your heart. You wear it while you do all your normal activities.

The monitor has wires that attach to small electrode pads. These pads are taped to your chest.

This kind of machine has many different names. It is sometimes called an ambulatory monitor, an ambulatory electrocardiogram, or an ambulatory EKG. It can also be called a 24-hour EKG or a cardiac event monitor.