If a patient had minimal irregularity of the right p1 pca segment without significant stenosis on cta angiogram. What would this indicate?

Age over 40. Sorry, but the majority of people over 40 and 90% by age 50 have some atherosclerosis of coronary arteries by scans. Probably more by catheterization.

worse news. It is not gradually worsening plaque that causes heart attacks but moderate ones breaking apart that causes heart attacks. Not predicatable and only marginally preventable.