Diseases of the Blood Vessels
D iseases of the blood vessels are the result primarily of adverse changes in the vessel walls, such as hardening of the arteries, stroke, and varicose veins.
A healthy circulation depends to a large extent not only on the condition of the blood-forming organs but on the pipelines through which this life-sustaining fluid flows. The arteries, which carry blood away from the heart, and the veins, which bring it back, are subject to a wide range of maladies. They may become inflamed, as in the case of arteritis, phlebitis, and varicose veins; or they may become clogged—especially the arteries—as a result of atherosclerosis (hardening of the arteries) or blood clots (thrombosis and embolism), which can prevent the blood from reaching a vital organ.