Ambulatory Electrocardiogram, commonly known as Holter monitoring, is a non-invasive diagnostic test that continuously records the electrical activity of the heart over an extended period, typically 24 to 48 hours. This portable device, worn by the patient during their daily activities, captures a comprehensive view of the heart's rhythms, helping healthcare professionals identify irregularities that may not be evident during a standard, short-duration electrocardiogram (ECG). Ambulatory ECGs are particularly valuable in assessing and diagnosing intermittent heart conditions, such as arrhythmias or episodes of chest pain. By providing a more extended monitoring period, this diagnostic tool offers a more comprehensive understanding of the heart's performance in real-world scenarios, aiding in the accurate diagnosis and personalized treatment planning for patients with cardiac concerns.