Experimental evaluation of microarterial grafts in rats and rabbits: long-term histological studies.

This experimental study was done to compare the fate of microarterial grafts versus microvenous grafts. Based on morphological aspects, patency rates, and histological features, the arterial grafts gave better long-term results than the venous grafts--due mainly to an absence of subintimal fibrotic changes in the microarterial grafts.