The central point of this study is the evaluation of coronary flow. The evaluation of
the measured flow through the transit time showed an average flow of 42.2 ± 23.4 ml/min
in Group A and 34.2 ± 19.1 ml/min in group B. featuring a statistically significant
difference in favor of group A. 
(A group) graft of right internal mammary artery to the anterior interventricular branch
(B group) graft of left internal mammary artery to the same branch
evaluation of coronary flow