Radio anatomic study of the dysplastic renal arteries angles of origin

Purpose. To compare the angulation at the origin of dysplastic renal arteri es compared to atherosclerotic renal arteries, in order to improve the tech nique for percutaneous transluminal angioplasty of FMD. Materials and methods. Retrospective analysis of 40 aortograms in patients who underwent renal angioplasty for dysplastic stenosis, with comparison wi th 45 control aortograms (with or without atherosclerotic lesions of the re nal arteries). The angle of implantation of the renal arteries was measured relative to the aortic axis in the frontal plane, taking into account only the angulation of its proximal segment. We identified three types of kidne ys with regard to their position relative to the renal artery ostium. Results. The angle of implantation of dysplastic renal arteries is signific antly sharper compared with the control group (63.8 degrees vs 80.9 degrees , p = 0.0001), irrespective of the side. The angulation did not correlate w ith the position of the kidney or the direction of the renal artery, sugges ting a congenital origin. Conclusion. The angle of implantation of the dysplastic renal arteries rela tive to the aortic axis in the frontal plane is sharper than the angle meas ured in non dysplastic renal arteries.