The Holter monitor is a type of portable electrocardiogram (ECG). It records the electrical activity of the heart continuously over 24 hours or longer while you are away from the doctor's office.
When to do a Holter Monitor ECG
Your healthcare provider may request a Holter monitor ECG if you have symptoms, such as dizziness, fainting, low blood pressure, ongoing fatigue (tiredness), and palpitations and a resting ECG doesn’t show a clear cause.
How to get ready for Holter Monitoring
Your healthcare provider will explain the procedure to you and you can ask questions. Based on your medical condition, your doctor may request other specific preparation.