FIG 1. Left ICA angiogram (lateral projection) shows high-grade (70%) proximal ICA stenosis. The flux proximally (Fluxp) at the point of maximal narrowing must equal the flux distally (Fluxd) along the normal vessel lumen.
70%) proximal ICA stenosis. The flux proximally (Fluxp) at the point of maximal narrowing must equal the flux distally (Fluxd) along the normal vessel lumen.