Late results of telescopic internal mammary-coronary artery anastomosis

Seven dogs had telescopic anastomosis of the IMA to the LAD or CCA. Twenty-two to twenty-eight months later all anastomoses were patent, but one was severely stenotic and three were moderately stenotic. Of the six dogs that were studied by right-heart bypass four demonstrated deterioration of LV function with IMA occlusion. Metabolic data were combined from six dogs and revealed changes similar to those observed in normal dogs with occlusion of the LAD, but with a blunted reactive hyperemia response.