Vascular disease is a form of cardiovascular disease that affects the circulatory system. As the heart beats, it pumps blood through the blood vessels, which are flexible tubes that carry blood to every part of the body. Arteries carry blood away from the heart, and veins return blood to the heart. It can be very difficult to make a vascular disease diagnosis, as there are a wide variety of symptoms and they can be signs of other disorders. Vascular diagnoses are made based upon the combination symptoms, family history, and a thorough examination by a specialist.