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In-plane RBC velocity vectors on a plane normal to the centreline in the carotid sinus of the stenotic carotid bifurcation at t = 0.10 s. Secondary flows in the form of Dean vortices are observed and are present throughout the cardiac cycle (not shown). This secondary flow pattern plays a key role in lowering the haematocrit on the outer wall of the ICA sinus (see main text).
