Effect of aggregation inhibitors on platelet adhesion on the vWF-coated surface. (A) Platelet adhesion with temporary arrest. (B) Platelet adhesion without temporary arrest. Platelet adhesion was measured in the presence of 1 mmol/L GRGDS (▧), 10 μg/mL anti-GP IIb/IIIa antibody (▦), or 5 mmol/L EDTA (▩) under the 3 different shear rates. (□) Control data. The mean ± SEM are results from five different experiments for anti-GP IIb/IIIa, 10 for the control, 3 for GRGDS, and 3 for EDTA.