The immediate function of sequential aortocoronary vein grafts to closely adjacent myocardial areas.
Blood-flow measurements were performed in 72 patients after sequential vein grafting (Y-grafting) to LAD and diagonal branches. The mean blood flow in the joint graft was 69 ml/min, i.e. significantly more than the 36 ml/min in one branch when the other was occluded. When one branch was occluded for 10 min (11 patients), there was insignificant increase of the flow through the nonoccluded branch. The mean joint graft flow and branch flow increased insignificantly after administration of dipyridamole. Lower blood flow in one branch of the sequential graft than in the joint graft is due to insufficient collateral system. High rate of flow in the joint graft probably reduces the rate of early and late occlusion.
D001783:Blood Flow Velocity; D001026:Coronary Artery Bypass; D004176:Dipyridamole / Q000627:therapeutic use; D006083:Graft Occlusion, Vascular / Q000188:drug therapy; D006801:Humans; D009204:Myocardial Revascularization
D004176:Dipyridamole