This case found co-dominant coronary circulation with anomalous RCA origin from the left coronary sinus, close to origin with acute angle and inter-arterial course. The ostial and proximal part of RCA has an attenuated caliber with moderate (50-70%) narrowing, likely dynamic narrowing.

Case courtesy of Dr Safwat Almoghazi MD, Radiologist, and Dr Mohammed Abdelshafi, Cardiologist.