Surgery center

What Is Holter Monitoring?

Named after its inventor, Dr. Norman Holter, a Holter Monitor is a small, portable electrocardiogram (ECG) device that continuously monitors the electrical activity of your heart over a 24 hour period. The monitor is designed to record every single beat of your heart for as long as you wear it. This lets your doctor compare your heart rates during the day and night, identify any abnormalities and track any symptoms.

Your Holter Monitor

When you receive a Holter monitor, small, painless pads (electrodes) are put on your chest. These connect to the lightweight unit, which attaches to a belt or shoulder strap. You need to keep the device on for at least 24 - 48 hours and complete a diary. While wearing the monitor, follow these tips:

  • Try to sleep on your back.
  • Don’t take a shower. A sponge bath is okay.
  • Follow your normal routine. Don’t avoid stress, work, or exercise.
  • If an electrode falls off or the unit makes noise, call to see what you should do.

When Using a Monitor

Stay away from electric blankets, magnets, metal detectors, and high-voltage areas such as power lines. They may affect the recording.

Holter Monitor Diary Guidelines

  • Write in the time of day for each entry you make.
  • Note each change in activity, including when you take medicine.
  • Note any symptoms you feel.