Thoracoabdominal aorta in Marfan syndrome: MR imaging findings of progression of vasculopathy after surgical repair

Radiology
S KawamotoE A Zerhouni

Abstract

To determine the natural history of vasculopathy of the thoracoabdominal aorta in patients with Marfan syndrome after composite graft repair of the aortic root. A total 224 magnetic resonance (MR) images obtained in 48 patients with Marfan syndrome over a period of 2.3-9.4 years (mean, 5.0 years) were retrospectively reviewed. On each image, the diameter of the thoracoabdominal aorta was measured and the presence of dissection or major peripheral artery aneurysms was determined. In 31 (65%) of the 48 patients, no statistically significant change (3 mm or less increase in diameter) in the diameter of the aorta occurred during the study (group 1); in the remaining 17 (35%) patients, a significant change occurred (greater than 3 mm increase) (group 2). The mean initial diameter of the native aorta was slightly larger in group 2 (mean, 27 mm +/- 8 [standard deviation]) than in group 1 (mean, 23 mm +/- 6). In group 1, the mean rate of dilation was 0.07 mm/y +/- 0.2; in group 2, the rate was 2.3 mm/y +/- 3.3. Two patients with aortic dissection were in group 1, whereas 14 such patients were in group 2 (P < .001). Aneurysms that involved major peripheral arteries were present in four (13%) of the 31 group 1 patients and in 12 (71%) of...Continue Reading

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