The results from 2DE were lower than that from 3DE but with no significant differences between them(P>0.05). There were closer limits of agreement between 3DE and Fick for LVSV(r[WTBZ]=0.95) than that between 2DE echocardiography and Fick(r=0.83).

• 2DE(Simpson法)所测LVSV与心导管(Fick法)所测结果呈中度相关(r=0·83；P<0·001)；而经胸3ED(disk-summation)所测LVSV与心导管检查所测结果呈高度相关(r=0·95；P<0·001)。