Congestive heart failure, which can lead to an inability to pump sufficient amounts of blood to the brain Atherosclerosis, which can cause a buildup of cholesterol plaques in the blood vessels, thereby decreasing the volume of blood that can flow through the vessel and reach the brain[1] Angiopathy, a disease of the blood vessels[6] Arterial hypotension, or low blood pressure in the arteries[3] Hypertension, or high blood pressure[7] Hyperlipidemia, or excessive cholesterol buildup in the blood vessels[7] Diseases such as sickle cell anemia, which can lead to deformed red blood cells clogging blood vessels and impeding blood flow[8] Carotid artery stenosis, or narrowing of the carotid artery which can decrease the volume of blood flow to the brain[7]