Figure 6.

Mammary graft before and after the reoperation with the radial graft: A,B: The left internal mammary artery graft was widely open before the reoperation (black arrow: left internal mammary artery, white arrow: anastomosis of the left internal mammary artery graft to the left anterior descending artey). C: After the reoperation involving a radial graft, the string sign developed on the previously patent left internal mammary artery graft (black arrow). D: The anastomosis of the radial graft is indicated by the white arrow. This radial anastomosis was applied more distally than the anastomosis of the mammary graft. The new bypass was administered on the left anterior descending artery as there was considered to be a significant lesion under the left internal mammary artery graft.