In most cases of atrial flutter, life expectancy is not necessarily related to the disease, which means that patients who have atrial flutter do not experience a significant decrease in life expectancy. If atrial flutter is not corrected in a timely manner, an excessively fast heartbeat can lead to heart failure. Patients with atrial flutter can have a ventricular rate of 150 or even 200 beats per minute. An excessively fast ventricular rate is the equivalent of a person running continuously at a fast pace, and is prone to muscular lysis. The heart is similar. An overly fast heartbeat can lead to a heavier burden on the heart, and can even cause the heart to contract without fully diastolizing to the point of producing ineffective ejection, which can easily lead to heart failure, and is an important reason why patients suffer from a decline in their physical condition. However, most patients with atrial flutter, who are unlikely to be able to tolerate such a high ventricular rate, will go to the hospital to seek medical help. After electrophysiological examination and radiofrequency ablation surgery in the hospital, the ventricular rate of most of the patients will be significantly reduced. Atrial flutter is basically treated very quickly. Very few patients die suddenly due to untreated atrial flutter, and atrial flutter rarely affects a patient’s life expectancy.