The mechanism of diastolic heart failure is when the ventricles are not able to receive blood, accompanied by preserved EF ejection fraction. The cause of diastolic heart failure is either dysfunction of the heart or physical damage.

Besides clinical symptoms, medical history, blood tests... ejection fraction (EF) is an important index to assess left ventricular systolic function in patients with heart failure.

The EF index is a typical parameter that often appears in the results of echocardiography. This is an extremely important index, contributing to the assessment of the heart's pumping function. Based on the results of this index, doctors can make accurate diagnoses of cardiovascular diseases that the patient is suffering from.