EF value is the ejection fraction of the left ventricle, the normal range is 50% to 70%, EF value of 44% suggests that the heart pumping function is reduced, it is necessary to pay attention to timely consultation to clarify the cause of the disease, avoid strenuous activities in order to avoid increasing the burden on the heart caused by cardiac insufficiency. EF value represents the ejection fraction of the left ventricle, i.e., the amount of blood that can be ejected from the heart each time the heart beats, which reflects the contractile function of the left ventricle, and the normal range is 50% to 70%. An EF value of 44% suggests that the heart’s pumping function is reduced, and prompt medical attention is needed to identify the cause of the disease for symptomatic treatment; at the same time, attention should also be paid to avoiding strenuous activities in daily life, so as not to increase the load on the heart, which may lead to cardiac insufficiency. EF value of 44% is already lower than the lower limit of the normal range, it is recommended to consult a doctor as soon as possible to avoid delay.