absolutely fine until you block off about 70% of the area here right so here is less than 50% blocked there is no reduction in blood flow here blood flow is getting in just fine if this gets to the point where it's starting to block 70 80 90 percent it's going to start to reduce blood flow so it's like a plumbing problem not enough blood flow but that's not usually how atherosclerosis gets you usually it's what we're going to see here is that before it blocks off all the vessel the plaque is going to rupture okay so you