Objective To quantitatively analyze the aortic root anatomical characteristics

and to screen the（）dimensional transesophageal echocardiography（RT-3 D-TEE）in AR patients.MethodsForty-two patients with AR were enrolled in AR group and 30 patients without AR were enrolled in control group.Parameters of the aortic root including root diameter（AAD

SOVD

STJD）

root area（AAA

SOVA

STJA）

root circumference（AAC

SOVC

STJC）were acquired by RT-3 D-TEE and compared between two groups.All parameters were analyzed by the Logistic regression

the parameters that have a significant effect on AR were selected and the receiver operating characteristic（ROC）curve of corresponding parameter was drawn to analyze the sensitivity and specificity of AR.ResultsCompared with the control group

SOVD

STJD

AAA

SOVA

STJA

AAC

SOVC

STJC in AR group were increased significantly（all P<0.05）

while only ADD had no statistical differences.STJA and STJC had significant influence on AR by multivariable Logistic regression（P=0.002

0.005）.The ROC curve analysis showed that taking STJA was 7.165 mm2

STJC was 9.3 mm as cutoff value

the sensitivity and specificity were 69.8%

95.0% and74.4%

95.0%

the area under ROC curve were 0.867 and 0.885

respectively.ConclusionThe aortic root parameters of thethree levels of the aortic annulus

aortic sinus

and sinus canal junction increase differently.Among them

the horizontal area and parameter of sinus canal junction change significantly

which are important factors leading to AR.