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Flow associated vasodilatation (FAD%) related to the extent of coronary artery disease (CAD). NCAD, no vessel alterations; CAD-0, vessel alterations but lesion < 50%; CAD-1, lesion > 50% in one vessel; CAD-2, lesion > 50% in two vessels; CAD-3, lesion > 50% in three vessels; FAD%, flow associated (vaso)dilatation derived as percentage change during reactive hyperaemia relative to the baseline scan at rest (100%).
