Holter

Holter Monitoring: Continuous ECG for Accurate Heart Rhythm Analysis

Holter Monitoring is a portable Electrocardiogram (ECG) test that continuously records the heart's electrical activity for 24 to 48 hours or longer. It helps detect heart rhythm abnormalities that may not appear during a standard ECG.

You carry a small device (Holter monitor) while performing your normal daily activities.

Why is Holter Monitoring Done?

Holter monitoring is recommended to:

• Detect irregular heart rhythms (arrhythmias)
• Investigate unexplained palpitations
• Evaluate dizziness or fainting episodes
• Monitor heart function after a heart attack
• Assess effectiveness of heart medications
• Check pacemaker performance

How Does a Holter Monitor Work?

• Small electrodes are attached to your chest
• These are connected to a portable recording device
• The device continuously records heart activity
• Data is later analyzed by a cardiologist

How is the Test Performed?

• Electrodes are placed on the chest
• The Holter monitor is connected and worn on a belt or strap
• You go about your normal daily routine
• You may be asked to keep a diary of symptoms
• After 24–48 hours, the device is returned for analysis

Benefits of Holter Monitoring

• Continuous heart monitoring over a longer period
• Detects intermittent or hidden arrhythmias
• Non-invasive and painless
• Helps correlate symptoms with heart activity
• Provides more detailed information than a standard ECG

Risks and Safety

Holter monitoring is very safe:

• No radiation exposure
• No electrical current enters the body
• Mild skin irritation from electrodes (rare)

When is Holter Monitoring Recommended?

Your doctor may suggest this test if you have:

• Palpitations or irregular heartbeat
• Unexplained fainting or dizziness
• Suspected arrhythmias
• Symptoms not detected in a routine ECG
• Ongoing heart condition requiring monitoring

Preparation for Holter Monitoring

• Wear loose, comfortable clothing
• Avoid bathing or swimming during monitoring
• Do not apply lotions or oils on the chest
• Follow your normal daily routine

What to Expect During the Test?

• You can walk, work, and perform daily activities
• Avoid heavy sweating or water exposure
• Record symptoms like chest pain, dizziness, or palpitations in a diary