My friend has blocked coronary arteries. what does that mean exactly?

Plaque: Usuly means build.up of cholesterol in the arteries . While this is not good not every blocked artrry needs to be opened since the body can sometimes compensate . Generally.medical treatment os recommended unless the blockage is critical (left main coronary) or you are having chest pain that cant be controlled Key is.this.is.a warning and you need to rwduce your risk diet exercise no smoking