The survival time of a 69-year-old patient presenting with atrial fibrillation cannot be generalized and is related to the patient’s specific condition. The prognosis of a 69-year-old patient with atrial fibrillation is related to the underlying disease, clinical stage, complications, treatment method, compliance, and age. If the patient is in the early stage of the disease and is not suffering from cerebral infarction, heart failure, coronary artery disease, or cardiomyopathy, he or she should follow the doctor’s advice and decide whether to undergo radiofrequency ablation or surgical treatment to convert the atrial fibrillation rhythm to sinus rhythm. At the same time, medications to maintain sinus rhythm should be taken as prescribed and anticoagulation should be administered for a short period of time. Most patients have a good prognosis and their life expectancy is not affected. If the patient’s primary disease is not well controlled, it may worsen the heart function and reduce the heart tolerance, which may increase the incidence of acute left heart failure or combine with the failure of other organ functions, which may lead to the patient’s life threatening at any time. Patients are advised to eat a low-salt, low-fat diet and control their body weight, while avoiding strenuous exercise, emotional stress and anxiety, and regular rest and recreation. If the ventricular rate increases, take medication to control the ventricular rate as prescribed by the doctor.