Clinical significance of the ratio between descending aorta diameter and ascending aorta diameter in rapid diagnosis of Stanford type B aortic dissection / 中国医师进修杂志

ABSTRACT

Objective To explore the clinical significance of the ratio of descending aorta diameter to ascending aorta diameter (rDA) in rapid diagnosis of Stanford B aortic dissection (AD). Methods A total of 118 patients with chest pain admitted to the emergency department from January 2013 to June 2018 in the People′s Hospital of Longhua were selected,and 42 patients with Stanford B type AD (group A) and 76 patients without AD (group B) were diagnosed by CT angiography.Eighty healthy people in the same period were selected as control group (group C). The descending aorta diameter and ascending aorta diameter were measured and rDA was calculated. The receiver operating characteristic curves were made. The sensitivity and specificity of descending aorta diameter and rDA for predicting Stanford B-type AD were analyzed. Results The descending aorta diameter, ascending aorta diameter and rDA in group A (male and female) were significantly higher than those in group C (male and female), while the descending aorta diameter and rDA in group A (male and female) were significantly higher than those in group B (male and female) (P<0.05). The sensitivity and specificity of descending aorta diameter with 30.0 mm as the cut-off point for the diagnosis of Stanford B-type AD were 92.9%(39/42),82.9%(63/76), and those of rDA with 0.8 as the cut-off point for Stanford B-type AD were 95.2%(40/42),90.8%(69/76). Conclusions The descending aorta diameter and rDA can be used as indicators for rapid diagnosis of Stanford B-type AD, and rDA is better than the diameter of descending aorta.