Abstract: Objective: To test the function of blood pump of the left ventricle in patients suffering from coronary heart disease and to discuss its clinical value.Methods: Seventy-two patients with coronary heart disease were examined with color Doppler echocardiography HBSONS 1000 made in America,and the index which could reflect the function of blood pump of the left ventricle was calculated.Results: Abnormal left ventricular ejection fraction(LVEF) was observed in 48 cases,abnormal SV in 56 cases,abnormal CO in 37 cases,abnormal CI in 39 cases and abnormal SVI in 44 cases.Eighty percent of the indices in the patients with AMI and heart failure were below the normal accounting,which was closely related to the degree of the disease.Conclusions: If the value of EF in patients with coronary heart disease and valve heart disease is less than 33 percent,it indicates that the prognosis is poor;if the value of EF is less than 40 percent,the mortality rate will rise greatly in the internal medicine and surgical department; if the value of EF is above 60 percent,no mortality will occur.