Abstract: Objective:To compare the measurement of the parameters of left ventricular systolic function using 64-slice multidetector CT(64SCT) with that using echocardiography(Echo).Method:A total of 78 patients who were suspected to coronary artery disease(CAD) underwent contrast-enhanced 64SCT with retrospective electrocardiographic-gating，and Echo to acquire left ventricular end diastolic volume(LVEDV)、left ventricular end systolic volume（LVESV）、left ventricular ejective fraction(LVEF）、left ventricular stroke volume(LVSV)and left ventricular myocardial mass(LVMM）.Result:The parameters of left ventricular function obtained with 64SCT were significantly correlated with the Echo data(r=0.959，0.758，0.918，0.989 and 0.894，P<0.001). There was a significantly larger overestimated of LVEDV and LVESV with 64SCT than with Echo(p<0.05).LVEF and LVMM was lower by 64SCT than Echo(p<0.05).LVSV was not significantly different(p>0.05).Conclusion:An excellent correlation between 64SCT and Echo is found for all parameters of left ventricular function.

Key words: left ventricular function, computed tomography, echocardiography, volumes, prognosis