title: A study of aortic dimension in type B aortic dissection.
abstract: Difference between arch diameter and true lumen diameter in the descending aorta was studied in patients with type B aortic dissection. The diameters of the aortic arch (Proximal ) and mid-descending aorta (Distal ) were measured on computer tomography angiography (CTA) in 20 healthy adults. Forty-two patients with type B aortic dissection who underwent endovascular repair were divided into two groups: an acute group (23 patients) and a chronic group (19 patients). The diameters of the arch (Proximal ) and the true lumen of the mid-descending aorta (Distal ) were measured on digital subtraction angiography (DSA) and CTA. The taper ratio was defined as (Proximal -Distal )/(Proximal )x100%. In the control group, the taper ratio was 13.0+/-4.7% on CTA. In the acute patients group, the taper ratio was 23.6+/-11.3% on DSA and 21.9+/-12.1% on CTA. In the chronic patients group, the taper ratio was 31.5+/-13.6% on DSA and 30.1+/-11.4% on CTA. In both acute and chronic type B aortic dissection, the aorta tapers significantly from arch to true lumen in the descending aorta. Stent-graft with tapered design may be a viable treatment option for endovascular repair of type B aortic dissection.
authors.affiliation: Cardiac Surgery Division, Beijing Institute of Heart, Lung and Vascular Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China. xushangdong@vip.sina.com
authors.forename: Shang Dong
authors.initials: SD
authors.lastname: Xu
authors.forename: Fang Jiong
authors.initials: FJ
authors.lastname: Huang
authors.forename: Jia Hui
authors.initials: JH
authors.lastname: Du
authors.forename: Yu
authors.initials: Y
authors.lastname: Li
authors.forename: Zhan Ming
authors.initials: ZM
authors.lastname: Fan
authors.forename: Jin Fei
authors.initials: JF
authors.lastname: Yang
authors.forename: Xiao Ying
authors.initials: XY
authors.lastname: Yu
authors.forename: Zhao Guang
authors.initials: ZG
authors.lastname: Zhang
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000784:Aortic Dissection / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D015901:Angiography, Digital Subtraction; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D017545:Aortic Aneurysm, Thoracic / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D001027:Aortography / Q000379:methods; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000295:instrumentation; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D010865:Pilot Projects; D011474:Prosthesis Design; D015607:Stents; D014057:Tomography, X-Ray Computed