Cerebro refers to the brain and vascular refers to arteries and veins. Cerebrovascular means blood flow to the brain. Cerebrovascular disease is a combination of defects in two places as brain and blood. Cerebrovascular diseases include all disorders that affect the brain temporarily or permanently. Cerebrovascular diseases include stroke, stenosis, deep vein thrombosis, atherosclerosis, transient ischemic attack (TIA) and aneurysm. A stroke occurs commonly with little or no warning. The most common form of stroke is ischemic stroke and the dreadful stroke is known as hemorrhagic stroke. TIA is a temporary event and it doesn’t cause any permanent damage to the body. When there is a build-up of fat and cholesterol in the arteries it leads to plaque formation. This plague is known as atherosclerosis and when this blockage is severe it is known as stenosis. An aneurysm is an effect which develops because of HTN or atherosclerosis in which the blood vessel to the brain weakens which causes bulging up of the blood vessel in that area.