 A median sternotomy incision was made and the left internal mammary artery was dissected free from its takeoff at the subclavian to its bifurcation at the diaphragm and surrounded with papaverine-soaked gauze. 
A median sternotomy incision was made and the left internal mammary artery was dissected free from its takeoff at the subclavian to its bifurcation at the diaphragm and surrounded with papaverine - soaked gauze .