Figure 8.

The left side shows the tight lesion of the middle left anterior descending artery before the coronary artery bypass grafting, while the right panel reveals the situation 3 years after the operation, with the short open distal part of the left internal mammary artery graft (arrow) bypassing the proximal part of the left anterior descending artery to the distal segment through the diagonal branch. The proximal part of the left internal mammary artery graft has been occluded because of the competitive flow through this connection. A slight regression of the originally very severe lesion may also be observed.