A heart rate stabilizer is a small electronic device that can be implanted in the body to keep the heart's rhythm stable by connecting it to the patient's heart and monitoring and intervening with its electrical signals. It can record the heart's electrical signals and assist doctors in diagnosis and treatment. There are three types of pacemakers, including single-chamber pacemakers, dual-chamber pacemakers, and defibrillators, depending on their function and how they are used.