Cardiac monitors are medical devices used to continuously observe the heart's activity. They measure vital signs such as heart rate and rhythm, providing real-time data to healthcare professionals. These monitors are essential in hospitals, especially in intensive care units, where patients require constant monitoring. There are different types of cardiac monitors, including ECG monitors and Holter monitors. ECG monitors provide immediate feedback on heart conditions, while Holter monitors are portable devices worn for 24 hours or more to track heart activity over time. Both types help in diagnosing and managing various heart-related issues.