A cardiac ejection fraction of 80 is abnormal, and the range of normal adult cardiac ejection fraction is 55%~65%; treatment varies according to whether it is accompanied by clinical symptoms or underlying diseases. 1. Accompanied by clinical symptoms: If the patient has symptoms of heart failure, such as dyspnea, edema, sputum, etc., a cardiac ejection fraction of 80% should be taken seriously, and it is considered to be a heart failure with an elevated ejection fraction, and the risk of death may be higher than that of a patient with a low ejection fraction; symptomatic supportive treatments, such as diuresis and vasodilatation, are needed. 2. Without clinical symptoms: If the patient is an asymptomatic normal adult, he/she should be reviewed regularly under the guidance of a doctor to observe any discomfort and changes in ejection fraction. Cardiac ejection fraction is the percentage of blood ejected per beat from the left ventricle of the heart to the end-diastole of the ventricle, which is an important indicator for evaluating the contractile function of the heart; it is recommended that the patient under the guidance of a physician for the next step in the treatment.