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Vascular and Interventional Radiology |
1 From the Departments of Cardiology (M.G., B.J.M.M.), Radiology (B.V.), and Medical Physics (J.A.E.S.), Academic Medical Center, Amsterdam, the Netherlands; the Departments of Cardiology (M.G., E.E.v.d.W.), Radiology (M.G., A.d.R.), and Biostatistics (A.H.Z.), Leiden University Medical Center, Albinusdreef 2, 2333 AA Leiden, the Netherlands; and the Department of Cardiology, Nijmegen University Hospital, the Netherlands (J.T.). Received June 1, 2000; revision requested July 17; final revision received October 30; accepted November 20. M.G. supported by the Interuniversity Cardiology Institute of the Netherlands and the SORBO Heart Foundation. Address correspondence to A.d.R. (e-mail: a.de_roos@lumc.nl).
PURPOSE: To investigate the feasibility of magnetic resonance (MR) flow mapping in the assessment of aortic biophysical properties in patients with Marfan syndrome and to detect differences in biophysical properties in the normal-sized aorta distal to the aortic root between these patients and matched control subjects.
MATERIALS AND METHODS: Seventy-eight patients with Marfan syndrome with aortic root dilatation and 23 matched control subjects underwent MR flow mapping in four locations in the normal-sized aorta (1, ascending aorta; 2, thoracic descending aorta; 3, descending aorta at the level of the diaphragm; and 4, abdominal descending aorta). Distensibility at each location and flow wave velocity between locations were calculated.
RESULTS: Compared with the control subjects, patients with Marfan syndrome had decreased aortic distensibility at three of the four locations (levels 1, 2, and 4; P < .05) and increased flow wave velocity between all locations (P < .05) in the aorta. In patients with Marfan syndrome, flow wave velocity was also significantly increased along the entire aortic tract beyond the aortic root (from level 1 to level 4).
CONCLUSION: MR imaging reveals abnormal biophysical properties of the normal-sized aorta in patients with Marfan syndrome. Monitoring of these properties is relevant for evaluating disease progression and treatment options.
Index terms: Aorta, flow dynamics • Aorta, MR, 941.129411, 941.129412, 941.12944, 943.129411, 943.129412, 943.12944 • Magnetic resonance (MR), vascular studies, 941.129411, 941.129412, 941.12944, 943.129411, 943.129412, 943.12944 • Marfan syndrome, 941.1971, 943.1971
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