What is an electrocardiogram?

An electrocardiogram (ECG), also sometimes called an EKG, is a procedure that records the electrical impulses that occur just before your heart beats.

When is it used?

An ECG is used to diagnose heart disorders.

How do I prepare for an electrocardiogram?

No preparation is necessary unless the doctor gives you special instructions.

What happens during the procedure?

This is a painless procedure that can be done in the doctor's office or in the hospital. Small disks or suction cups, made of metal or plastic, are attached to your chest, wrists, and ankles. The disks are connected to a machine that records electrical impulses of the heart and shows any abnormalities that occur when you are at rest.

A lightweight portable machine called a Holter monitor may be used to take a recording over 24 to 72 hours. This shows how your heart works during regular activity.

What are the benefits of this procedure?

This procedure helps in diagnosis of heart disorders.

What are the risks associated with this procedure?

There are no obvious risks but discuss your concerns with your doctor.

When should I call the doctor?

Call the doctor immediately if you have any change or worsening of pain or symptoms.

Call the doctor during office hours if:

• You have questions about the procedure or its result.

• You want to make another appointment.