24-Hour Holter ECG Monitoring

Procedure Overview

24-Hour Holter ECG Monitoring at Gangnam Heartscan Healthcare Center provides continuous ambulatory recording of the heart's electrical activity over a full 24-hour cycle. Because paroxysmal arrhythmias and transient ischemic episodes may not appear during a brief resting ECG in the clinic, continuous Holter monitoring captures heart rhythm patterns during normal daily routines, physical activity, and sleep.

Clinical Indications

• Evaluation of intermittent palpitations, fluttering sensations, or skipped heartbeats
• Investigation of unexplained dizziness, presyncope, or fainting episodes
• Detection of paroxysmal atrial fibrillation, supraventricular tachycardia, ventricular ectopy, or bradyarrhythmias
• Assessment of heart-rate variability and rhythm response to antiarrhythmic therapy

How the Screening Works

1. Monitor Fitting: Compact chest electrodes are attached to the skin and connected to a lightweight portable Holter recorder worn on a belt or shoulder strap.
2. 24-Hour Ambulatory Recording & Symptom Diary: The patient goes about normal daily activities while noting any symptoms (such as palpitations or chest discomfort) and their exact times in a log.
3. Device Return & Cardiologist Analysis: After 24 hours, the recorder is returned to the clinic, where the complete beat-by-beat waveform data is analyzed by a cardiologist and correlated with the symptom diary.

Preparation & Precautions

• Take a shower before visiting the clinic for device attachment, as the monitor and chest electrodes must remain dry and cannot be exposed to water during the 24-hour recording period.
• Wear a loose-fitting, comfortable button-down shirt or blouse to accommodate the leads discreetly.
• Avoid electric blankets, high-voltage magnetic fields, or metal detectors while wearing the recording device.