According to statistics, only less than 50% of patients can recover sinus rhythm immediately after maze surgery and maintain it all the time, and most patients may still have paroxysmal atrial fibrillation within six months after surgery, but this does not mean that the surgery is a failure, because the damage of the surgery will bring some changes and effects to the heart, causing the heart to be in an unstable state in the initial period after surgery, so the real effect of the internal maze surgery can only be judged six months after surgery, and the bulk of medical studies done at home and abroad and the reported success rate of the surgery are also observed in patients more than six months after surgery.