The normal values of the latest cardiac ultrasound are as follows: a. For 2D cardiac ultrasound measurements, the normal value of aortic internal diameter is less than 30 mm, the normal value of pulmonary artery internal diameter is 12-26 mm, the normal value of septal thickness is 6-12 mm, the normal value of left ventricular posterior wall thickness is 6-12 mm, the normal value of left ventricular internal diameter is 45-50 mm, the normal value of left atrial internal diameter is less than 30 mm, the normal value of right ventricular internal diameter is 7-23 mm, normal values of right atrial internal diameter 33-41 mm, and normal values of right ventricular outflow tract less than 20 mm. Second, for the left heart function of the cardiac ultrasound measurements, the normal value of end-diastolic volume is 108±24 ml, the normal value of end-systolic volume is 45±16 ml, the normal value of end-diastolic internal diameter is 35-55 mm, the normal value of end-systolic internal diameter is 20-40 mm, the normal value of ejection fraction is 50%-70%, the normal value of shortening fraction is 30%-45%, the normal value of left ventricular ejection fraction is 55%- 80%, left ventricular shortening rate normal value of about 30%, E peak to A peak ratio normal value greater than 1, output per beat normal value of 70-90 ml. However, all indicators should be diagnosed by a doctor and should not be judged blindly by yourself.