Late lesions in aorta-coronary artery vein grafts.

Aorta-coronary artery vein grafts, obtained from 2 patients 37 and 59 months after an aorta-coronary bypass operation, showed extensive mural changes characterized by degenerative tissue lesions, loss of normal morphological features of the intima, and extracellular accumulation of lipids. Both patients had increased plasma triglyceride levels.