A Holter monitor is a battery-operated portable device that measures and tape records your heart’s activity (ECG) continuously for 24 to 48 hours or longer depending on the type of monitoring used. The device is the size of a small camera. It has wires with silver dollar-sized electrodes that attach to your skin. The Holter monitor and other devices that record your ECG as you go about your daily activities are called ambulatory electrocardiograms.
- A cardiac event recorder makes a record of your electrocardiogram (ECG or EKG) when you have fast or slow heartbeats, or feel dizzy or like you want to faint. It can also be used to see how you respond to medicines.
- Some cardiac event recorders store your ECG in memory in the monitor. Your ECG can be sent by telephone to a receiving center or to your doctor.
- There are no risks when using a cardiac event recorder.
You may need to wear an event recorder for several days or up to a month. With several recordings, your doctor will be able to decide if your irregular heartbeats require more tests or treatment.