The ef value is also called the left ventricular ejection fraction, ef value of 47% can be restored to 60% in some people, but most of the ejection fraction decline caused by chronic diseases is very difficult to restore to normal 60% and above. Ejection fraction reflects the systolic and diastolic function of the heart, and the value can be clarified by cardiac ultrasound. The normal ejection fraction of the heart is 60% or more, if it is lower than 50%, in most cases there is heart failure caused by organic heart disease. If the decline in cardiac function occurs in the acute phase, resulting in an ejection fraction of 47%, it is possible to reach 60% through early treatment and later with the recovery of cardiac function. For example, in acute myocardial infarction, stress cardiomyopathy, and alcoholic cardiomyopathy, ejection fraction is likely to recover if early intervention is directed at the primary disease. It is difficult to completely normalize the decrease in ejection fraction due to most organic heart diseases, especially in the case of chronic diseases such as dilated cardiomyopathy, heart valve disease, old myocardial infarction, or some of the acute diseases mentioned above that are not corrected in a timely manner, which leads to irreversible damage to cardiomyocytes and long-term heart failure. If organic heart disease exists, it is important to go to the hospital as early as possible, the earlier the treatment, the better the prognosis is also, ef value of 47% need to go further to the cardiology department for treatment.