Even minor plaque build-up can be dangerous for the heart.  Cleveland Clinic study shows importance of keeping coronary plaque at bay.
D002339:Carotid Arteries / Q000000981:diagnostic imaging*; D003324:Coronary Artery Disease / Q000175:diagnosis*; D004032:Diet; D015444:Exercise; D015438:Health Behavior; D006266:Health Education; D006304:Health Status; D006801:Humans; D009203:Myocardial Infarction / Q000517:prevention & control*; D010353:Patient Education as Topic; D058226:Plaque, Atherosclerotic / Q000175:diagnosis* / Q000517:prevention & control; D014463:Ultrasonography