Figure 1

(a) Coronary angiography of the right coronary artery in the AP-cranial projection demonstrating two stenotic lesions of 70% and 80% (arrows), located at the proximal and middle segment respectively, of a right coronary artery (RCA), with significant tortuosity. (b) Several slit-like stenotic lesions resembling accordion effect developed after successful wiring using a 0.014-inch Hi-torque Cross-IT guide-wire and balloon dilatation at the straightened segments (arrows). Multiple intracoronary administrations of nitrate did not resolve the newly appeared lesions.