Types of grafts and distribution of anastomoses to target vessel
There were no significant differences in the types of grafts used and the distribution of each type of graft to coronary artery target vessel. All 50 patients received 1 RA graft, 1 in-situ LIMA to LAD and 1 SVG. In addition, 5 patients in ERAH and 6 in ORAH group received right internal mammary artery (RIMA) conduit. Two patients in each group had their LIMA also sequentially anastomosed to the diagonal branch. Saphenous vein grafts were often used to bypass more than one target vessel in both groups resulting in the construction of 39 and 36 distal anastomoses in ERAH and in ORAH groups respectively (Table 3 ).
Regarding the distribution of RA graft to target vessels, most RA grafts in ERAH and ORAH groups were placed to obtuse marginal (OM) (n=21), followed by right coronary artery (RCA) (n=12), ramus intermedius (n=9), posterior descending artery (PDA) (n=5) and the diagonal branch (n=3), without significant intergroup differences (Table 3 ).