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The predilection sites of arterial thrombosis are characterized by local increase in wall shear stress, flow separation with eddy formation and stagnation point flow. The defenders of high shear, as well as those of low shear theory of thrombogenesis, point to correlations of predilection sites and the respective flow abnormalities. Experimental evidence is provided, that high shear rates can damage both red cells and platelets, that lysed red cells constitute a potent platelet stimulant, due to their content of adenine nucleotides, and that platelets do not adhere to surfaces unless transported onto them by convective motion, the effectiveness of the platelet-wall interaction being enhanced by platelet activation. Based on these facts, a resolution of the contrast between high and low shear theory of thrombosis is attempted in a way, that the different flow regimens, with blood cells sequentially passing them, are each considered important and interdependent steps on the way to thrombosis.
Wurzinger et al. (Tue,) studied this question.