A Holter Monitor is a small, portable device that continuously records your heart's electrical activity for 24 to 48 hours. It is often used to diagnose irregular heartbeats or other heart conditions. Patients wear the monitor attached to their chest with sticky patches, allowing doctors to analyze the heart's rhythm over time. During the monitoring period, patients can go about their daily activities, but they are usually advised to keep a diary of any symptoms they experience. After the monitoring is complete, the data is reviewed by a healthcare professional to identify any potential issues with the heart's function.