Radial Artery Graft String Sign Due to Lumen Obliteration by Neointima

The radial artery is a commonly used conduit for coronary artery bypass grafting. Long-term patency rates are at least as good and in some series are better than for saphenous vein grafts ([1,2][1]). However, radial artery graft failure remains a significant problem ([3][2]), in particular in cases