An ECG monitor, or electrocardiogram monitor, is a medical device used to measure and display the electrical activity of the heart. It provides real-time data about heart rhythms, helping healthcare professionals detect any irregularities or conditions such as arrhythmias or heart attacks. These monitors typically consist of electrodes placed on the skin, which capture electrical signals from the heart. The information is then transmitted to a screen, allowing doctors to analyze the heart's performance and make informed decisions about patient care. ECG monitors are essential tools in hospitals and emergency settings.