<unk>  generally refers to the narrowing, hardening or enlargement of arteries and veins. It is often due to the build-up of fatty deposits in the lumen of<unk><unk> s or infection of the<unk>  wall. This can occur in various locations such as coronary<unk><unk> s, peripheral arteries and veins. The narrowed arteries would block the<unk>  supply to different organs and tissues. In severe conditions, it may develop into more critical health problems like myocardial infarction, stroke or heart failure, which are some of the major reasons of death. There are many causes contributing to<unk>  including high<unk>  cholesterol and calcium levels,<unk>  clot formation and inflammation of arteries. It is found that age, sedentary lifestyle, diets rich in lipids, smoking, diabetes and family history of cardiovascular diseases are common risk factors. A mild degree of<unk>  may be asymptomatic.<unk>  tests on cholesterol and calcium level can be performed to monitor the risk of having the disorder. Additionally, techniques such as angiography and ultrasound imaging are useful tools for diagnosis. It can be treated by both medication or surgery, depending on the type of<unk> .
Blood vessel disorder
Vascular disease
Brain damage
Central nervous system disease
Vascular occlusion
Vascular anomaly
Pigmentation disorder
Neurological disorder