What's a Holter Monitor/24 Hour ECG Test?

In this video, Dr Iain MacGarrow of Essex Private Doctors explains how heart rhythm monitoring works and why a standard ECG test in clinic may not always detect intermittent issues. A Holter monitor continuously records your heart’s electrical activity over 24 hours (or longer if needed), helping with accurate arrhythmia diagnosis and identifying conditions like atrial fibrillation. Unlike a quick in-surgery ECG, ambulatory ECG monitoring allows doctors to assess your heart while you go about your daily activities — whether you're exercising, sleeping, or relaxing at home. This type of cardiac monitoring is especially useful for detecting intermittent symptoms and monitoring potential rhythm disturbances that may increase stroke risk. In this video, you’ll learn: What a 24 Hour ECG / Holter Monitor is How the electrodes are attached What to expect during the monitoring period How we detect irregular heart rhythms and atrial fibrillation What happens after your results are reviewed If you’re concerned about heart palpitations, possible atrial fibrillation, or need further investigation into your heart rhythm, this video will guide you through the process and explain what happens next.