Figure 1: Coronary angiogram RAO and LAO views showing moderate disease of mid LAD (a), severe narrowing of the segment 5 minutes after sublingual NTG administration (b & c) and resolution of severe narrowing 10 minutes after s/l NTG at the time when wire was introduced into the left anterior descending artery for IVUS evaluation. (Aortic pressure (mm Hg) tracings at the time displayed at the top).