Angio = blood, gram = picture; pictures which show a 2d image, still or motion, of dye added into the blood, so that the dye/blood column shows on x-ray.
Artery ds: an accumulation of white blood cells, living & dead, within artery walls. Arteries enlarge/not narrow in response to ds. Wall not shown in angiogram
images+only larger openings visible. Stenosis due to plaque rupture
& clots in opening.