Pacemakers have been used in humans for 50 years, and they have saved countless patients. Patients with heart disease will want to know what conditions require a pacemaker, so let me tell you now. Pacemaker therapy is mainly used to treat patients with a slow heartbeat. A slow heartbeat can be caused by a lesion in the heart’s command unit (medically known as the sinus node) and/or by an obstruction in the conduction of the heartbeat’s commands. A slow heartbeat causes a series of symptoms of oxygen deficiency, such as dizziness, vertigo, darkness, fainting, memory loss, fatigue, reduced activity endurance, chest tightness, panic, shortness of breath, etc. If you have a slow heartbeat and some of these symptoms, you may need a pacemaker to keep your heart rate up to improve your quality of life. You may also need a pacemaker if the symptoms are transient, or if the symptoms are not very obvious, but tests have revealed significant cardiac arrest and atrioventricular block, or a fast and slow heartbeat. In addition, if you have to take certain medications that affect your heartbeat and you have a slow heartbeat, you may also need a pacemaker to protect your heart. With the rapid development of medical technology and pacing techniques, pacing therapy is no longer limited to patients with slow heartbeats. Some pacemakers (triple-chamber pacemakers) can also treat heart failure and improve heart function by pacing. In addition, patients with coronary infarction, cardiomyopathy, refractory heart failure, and other high-risk patients prone to malignant tachyarrhythmias such as ventricular tachycardia or ventricular fibrillation, as well as those with a family history of sudden cardiac death, need special pacemakers with defibrillation to prevent sudden cardiac death. If you are afflicted by one of these disorders, you may need cardiac pacing therapy. It is important to go to the hospital for the necessary tests to determine if you really need cardiac pacing. All in all, the correct and timely choice of pacing therapy and a pacemaker will make every heartbeat exciting.