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Interact CardioVasc Thorac Surg 2008;7:244-248. doi:10.1510/icvts.2007.163154
© 2008 European Association of Cardio-Thoracic Surgery
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Institutional report - Vascular thoracic

A study of aortic dimension in type B aortic dissection

Shang Dong Xua,*, Fang Jiong Huanga, Jia Hui Dub, Yu Lib, Zhan Ming Fanb, Jin Fei Yanga, Xiao Ying Yuc and Zhao Guang Zhanga

a Cardiac Surgery Division, Beijing Institute of Heart, Lung and Vascular Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
b Radiology Division, Beijing Institute of Heart, Lung and Vascular Diseases, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
c Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA

*Corresponding author. Tel.: +86-10-64456776; fax: +86-10-64443324.

E-mail address: xushangdong{at}vip.sina.com (S.D. Xu).

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 {phi}) and mid-descending aorta (Distal {phi}) 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 {phi}) and the true lumen of the mid-descending aorta (Distal {phi}) were measured on digital subtraction angiography (DSA) and CTA. The taper ratio was defined as (Proximal {phi}–Distal {phi})/(Proximal {phi})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.

Key Words: Aortic dissection; Stent-graft; Endovascular repair

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