Coronary angiogram is a videographic snap shot of moving targets. Coronary arteries are dynamic , tortuous vessels of varying dimensions .Normal vessels sometimes appear as an illusion of lesions and tight lesions may appear innocuous at times. So the rule is never rely on a single view before reporting.
This is an angiogram of a patient , which one of my fellows referred to as “a black pearl inside the LCX !
The same patient,s angiogram showing origin of OM1
Beware of radiological artifacts in various angiograms. It can lead to erroneous interpretation and interventions !