A heart monitor is a medical device that tracks the heart's activity, helping doctors and patients understand how well the heart is functioning. It measures the heart's rhythm and rate, providing important information about a person's cardiovascular health. Heart monitors can be used in hospitals or at home, and they come in various forms, including ECG machines and wearable devices. These devices are essential for diagnosing heart conditions and monitoring patients after surgery or during treatment. By continuously recording data, heart monitors can alert healthcare providers to any irregularities, ensuring timely intervention if needed. This technology plays a crucial role in maintaining heart health and preventing serious complications.