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A representative recording of intracranial trans-stenotic pressure measurements. In this case, the mean pressure proximal to the MCA stenosis was 110 mm Hg, and the mean distal pressure was 65 mm Hg A. The distal/proximal pressure ratio (DPPR) was 0.59, and the proximal-distal pressure gradient (PDPG) was 45 mm Hg. After treatment of the ICAD with a balloon expandable stent, the pressure difference was abolished B.
