A Holter Monitor is a portable, wearable device used for continuous recording of the heart’s electrical activity (ECG) over 24 to 72 hours or longer during a patient’s normal daily routine. It helps detect intermittent cardiac arrhythmias, palpitations, silent ischemia, and other heart rhythm abnormalities that may not appear during a standard ECG. Lightweight and easy to wear, Holter monitors provide accurate, long-term cardiac monitoring, enabling physicians to evaluate heart function, diagnose cardiovascular conditions, and make informed treatment decisions.