GW24-e1355 Acute stanford B aortic intramural hematoma: early and midterm following-up and CT morphological change

Objectives To summarise the clinical performances and to analysis CT morphological characters of acute Stanford B Aortic Intramural Hematoma (IMH). Methods From January 2010 to June 2012, a total of 28 patients of IMH fulfilling in the General Hospital of People’s Liberation Army were retrospectively reviewed, 18 patients were followed up with CT, we measured the vessel wall maximum thickness (VWMT, to abbreviate MT), the aortic maximum outside diameters (AMOD, to abbreviate OD) and the aortic inner diameters (AID, to abbreviate ID) at that time and 1 week, 1, 3, 6, 12 months after onset. Statistical analysis was performed using the paired t-test. Results Of these 28 IMH, no death occurred, and 2 patients received endovascular repair. According to the CT of 18 IMH followed up, the MT was (12.1 ± 2.6) mm. The hematoma disappeared in 44.4% patients 6 months after onset. The hematoma disappeared more in the patients with MT≤10mm than those with > 10 mm (85.7% vs. 18.2%, P < 0.01). The hematoma disappeared in 13 out of 15 patients (86.7%) 12 months after onset. The OD reduced (7.3 ± 2.4) mm per year, and reduced (6.7 ± 3.5) mm and (0.6 ± 1.7) mm within the first 6 months and 6 months after, respectively. The OD increased (0.9 ± 0.5) mm after the hematoma disappeared. The ID increased (6.1 ± 2.3) mm per year, and increased (4.7 ± 1.8) mm and (1.2 ± 1.0) mm within the first 6 months and 6 months after, respectively. Conclusions The early and midterm results of IHM were satisfactory: most of the hematoma disappeared 12 months after onset. The hematoma disappeared more and rapidly in the patients with MT≤10 mm than those with >10 mm. OD reduced and ID increased before the hematoma disappeared, and both increased after. The aortic cavity had a trend to dilate continually.