Analysis of Risk Factors for Aortic Enlargement in Patients with Chronic Type B Aortic Dissection

Objectives: Uncomplicated type B aortic dissection is generally treated with medical management including antihypertensive therapy. The purpose of this study is to investigate risk factors associated with the aortic enlargement in medically treated patients.Methods: Between July 2004 and April 2016, 127 consecutive patients with acute type B aortic dissection were treated in our institution. Of these, 104 patients diagnosed with uncomplicated type B dissection were managed medically as an initial treatment. According to the diameter of the dissected aorta, these patients were retrospectively placed into 2 groups: 1) enlargement group (group E: n=36); and 2) unchanged group (group U: n=68).Results: There was statistically significant difference regarding the initial diameter of the dissected aorta (group E: 42±7 mm, group U: 36±7 mm) (p