Evaluation of balloon angioplasty of coarctation restenosis by magnetic resonance imaging |
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| Authors: | R L Soulen J Kan S Mitchell R I White |
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| Affiliation: | 1. Fujian Provincial Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen 361005, PR China;2. Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen 361005, PR China;3. College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, Fujian 362000, China;4. Xiamen University, Xiamen, Fujian 361005, China;5. School of Science & Technology, Open University of Hong Kong, Kowloon, Hong Kong SAR, PR China;1. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;2. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;3. Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, College of Environmental and Biological Engineering, Chongqing Technology and Business University, Chongqing, 400067, China;4. Research Center for Bioengineering and Sensing Technology, Department of Chemistry & Biological Engineering, University of Science & Technology Beijing, Beijing 100083, China;1. Department of Cardiac Surgery, The Royal Children’s Hospital, Melbourne, Victoria, Australia;2. Department of Paediatrics of the University of Melbourne, Melbourne, Victoria, Australia;3. Murdoch Childrens Research Institute, Parkville, Victoria, Australia;4. Department of Cardiology, The Royal Children’s Hospital, Melbourne, Victoria, Australia |
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| Abstract: | Eight patients treated by balloon angioplasty for coarctation restenosis have been followed for 4 to 54 months (mean 40) by physical examination using Doppler pressures and by magnetic resonance imaging in a superconducting magnet operating at 0.6 tesla. Image analysis was performed by inspection and by measurement of the aorta, with particular attention to the angioplasty site and its relation to the ascending aorta at the same axial level. Similar measurements were made from immediate postangioplasty angiograms. Residual pressure gradients were 0 to 12 mm (mean 2), reflecting persistent absence of a gradient in 1 patient and further gradient reduction in 7. Images showed no aneurysm formation, mild residual or recurrent stenosis in 4 patients, minimal focal periaortic soft tissue thickening in 1 patient and an interval increase in the ratio of ballooned segment diameter to ascending aortic diameter in the 7 patients in whom it could be measured. Thus, intermediate-term results of balloon dilatation of coarctation restenosis are excellent and magnetic resonance imaging is well suited to the serial studies required in these patients. |
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