After obtaining maximal hyperemai by an intracoronary injection of Adenosine 60 cc,the measured fractional flow resered was in the borderline normal zone.0.76the measured fractional flow resered (FFR)was in the borderline normal zone.0.76.However after intracoronary administration of NTG 400 mcg,FFR increased to the normal range,0.89-0.92,therefore coronary intervention was deferred.