Holter Monitoring is a continuous, portable electrocardiogram (ECG) that records the heart’s activity over 24 to 48 hours. It is used to detect irregular heart rhythms, palpitations, or unexplained chest pain that may not appear during a standard ECG. The Holter monitor tracks your heart’s electrical activity as you go about your daily routine, offering a more comprehensive analysis of your heart’s function. Patients should choose Holter monitoring when experiencing intermittent symptoms like dizziness, fainting, or palpitations.