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Pressure tracing recorded in a patient with an isolated stenosis in the mid left anterior descending coronary artery. B, After intracoronary injection of 18 μg adenosine, distal coronary pressure decreases to 48 mm Hg and translesional pressure gradient (ΔPmax) increases to 40 mm Hg. In this particular case, myocardial fractional flow reserve (FFRmyo≅Pc/Pao during hyperemia) reaches 0,55.