Houston Methodist. Leading Medicine.
Houston Methodist. Leading Medicine

Methodist DeBakey Cardiology Associates

Holter Monitor

» What is a Holter monitor?
» Why is Holter monitoring performed?
» How does a Holter monitor work?
» What will the results tell me?

What is a Holter monitor?

The Holter monitor is a device that records your heart rhythm continuously for 24 to 48 hours.

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Why is Holter monitoring performed?

A Holter monitor tells your doctor how your heart responds to normal activity during a typical day. It is often used to diagnose heart rhythm problems, to monitor your heart's health after a heart attack, or to gauge your heart's reaction to new medication.

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How does a Holter monitor work?

Small sticky patches (electrodes) will be attached to your chest and connected to wires from a small monitor. The monitor is battery-powered, and you will carry it in your pocket or a small pouch during the recording period.

Your doctor will ask you to keep a diary of your activity during the monitoring period so that your heartbeat patterns can be matched with different activities. After 24 or 48 hours, you will return the monitor to your doctor's office, where the recordings can be analyzed for any irregularities.

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What will the results tell me?

Your results will be considered normal if your heart rate falls within a normal range for each of your recorded activities. Abnormal results could indicate an arrhythmia or could mean that your heart is not getting enough oxygen.

The monitor may also detect conduction block, a condition in which the electrical impulses from the atria are either delayed or do not continue into the ventricles.

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For more information about Methodist DeBakey Cardiology Associates or to make an appointment, please call us at 713-441-1100 or 888-361-4375, or contact us online.