In general, the length of survival of atrial fibrillation in 70 year olds varies considerably with the severity of the underlying disease, ranging from a few months to a few years. Atrial fibrillation is a common clinical atrial arrhythmia that occurs in patients with organic heart disease, most often in hypertensive heart disease, cardiomyopathy, and chronic pulmonary heart disease. Survival rates vary greatly depending on the severity of the primary disease and its treatment. In patients with severe underlying diseases, atrial fibrillation may induce malignant arrhythmia and even sudden death if not rescued in time. In addition, atrial fibrillation is prone to embolism, cerebral embolism and peripheral arterial embolism, etc. Therefore, it is recommended that anticoagulants such as warfarin and rivaroxaban be used after risk assessment. For atrial fibrillation of unknown cause that occurs in the elderly, the primary cause should be actively searched for, and medical treatment or interventional therapy should be chosen under the guidance of doctors to prolong the survival period.