Narrows pipe. Just as narrowing your garden hose can give you a thinner stronger stream; however the real concern is a plaque ain't smooth.Damage a platelet, get a clot, stop the all important flow of blood. Lack of oxygen causes death to cells fed by this area. Picture this in the vessels that feed your heart or your brain.
It is a risk factor. Hypertension (high blood pressure) is one of the major risk factors for atherosclerosis (hardening of the arteries or vascular disease). A risk factor means is something that significantly increases the chance you will get a "bad" outcome. So, if you have hypertension, it is significantly more likely you will have a heart attack or stroke vs. Someone without hypertension - all other things equal.
Hypertension. Prolonged hypertension is a high risk factor for the development of athersclerosis. Many people with hypertension do not feel it or know they have it, so it is important to obtain regular physical examinations to help you stay healthy.