Figure 1  .

In vivo platelet GMP-140 expression detected with a γ camera in saphenous vein and internal mammary artery grafts after coronary artery bypass surgery. Counts are expressed as a percentage of counts detected in the aorta. Each point represents the mean (SEM) of six patients. (A) Platelet activation is greater in vein grafts than in artery grafts. (B) Counts over vein grafts in the presence (GSNO) or absence (control) of GSNO (40 nmol/min). (C) Counts over artery grafts in the presence (GSNO) or absence (control) of GSNO (40 nmol/min). Platelet activation in vein and arterial grafts is inhibited by GSNO.