Since human blood system is a closed system, my carotids are only about 10% occluded, does that mean that my cardiac veins are also only lightly occluded or does the fact that the cardiac veins are much narrower make a difference in terms of plaque being able to attach to the walls? The volume of blood in the carotids is much greater than in the narrow cardiac veins, does that make a difference in the ability of plaque to attach to the walls