The left ventricular diastolic EA value is calculated from the E value and A value in the cardiac ultrasound findings. The EA value reflects the diastolic function of the left ventricle of the heart, where the E value is the maximum filling velocity of blood flow in early ventricular diastole, with a normal value of about 73 cm/s, and the A value is the maximum filling velocity of blood flow in late ventricular diastole, with a normal value of about 40 cm/s. Therefore, the EA ratio should be greater than 1 in normal cases. If the EA value is less than 1 on cardiac ultrasound, it suggests that the left ventricle is hypodiastolic. Left ventricular hypodiastolic function usually occurs in older patients with chronic diseases, such as patients with hypertension, coronary heart disease, diabetes mellitus, hypertrophic cardiomyopathy and chronic kidney disease. Prolonged myocardial ischemia, myocardial fibrosis, or hypertrophy of the ventricular wall leads to increased myocardial stiffness, causing a decrease in the diastolic function of the left ventricle, when the EA is reduced. Patients with abnormal left ventricular diastolic EA values are recommended to go to the cardiology department for a comprehensive analysis based on symptoms, signs and symptoms, and other test results, and to actively treat the primary cause.