The normal heart rhythm in humans is sinus rhythm, in which the heart beats regularly. When the heart develops atrial fibrillation or atrial fibrillation (AF), the heart beats irregularly. AF can affect cardiac function and left atrial thrombus. If the clot is dislodged, it can travel with the blood to small arteries throughout the body, causing serious complications such as cerebral embolism, which can lead to serious consequences. Atrial fibrillation is divided into paroxysmal atrial fibrillation and persistent atrial fibrillation. Atrial fibrillation can exist in combination with organic heart disease such as heart valve disease and coronary heart disease, or it can be just atrial fibrillation (idiopathic atrial fibrillation). Once a person’s heart rhythm becomes atrial fibrillation, most people have uncomfortable symptoms, such as palpitations, panic, fatigue and fatigue, and a physical examination reveals absolute arrhythmia with varying heart sound intensity. For patients with organic heart disease may also aggravate heart failure and even shock. There are many treatments available for atrial fibrillation, the first of which should be active treatment of the primary disease. For example, rheumatic mitral stenosis, ischemic heart disease, etc., if the primary disease requires surgery, radiofrequency ablation of atrial fibrillation is performed at the same time; for idiopathic atrial fibrillation, drugs, direct current electrical cardioversion or radiofrequency ablation can be used. Current studies have shown that both pharmacological and electrical resuscitation methods are unsatisfactory and that radiofrequency ablation is the ideal choice. Nowadays, evidence from evidence-based medicine has shown that both surgical endocardial ablation and thoracoscopic-assisted epicardial ablation are significantly more effective than percutaneous endocardial ablation in internal medicine, with a success rate of over 70%. Moreover, the side effects caused by radiation exposure during percutaneous catheter endocardial ablation can be avoided. There are certain indications for thoracoscopic-assisted radiofrequency ablation, and the physician will evaluate the condition to determine whether thoracoscopic-assisted radiofrequency ablation is appropriate.