One major cause of stoke is the blockage of an artery. This blockage is because of a clot that blocks the blood supply to an artery of human brain. Blocked artery would not be able to supply enough oxygen or glucose to a specific part of the brain. As a result cells of that particular part of human brain die. Usually, high cholesterol can rupture the inner surface of the small blood vessels which gradually leads to a clot. The main reasons for this clot are high cholesterol levels, high blood pressure, smoking and diabetes.
Another type of stroke is known as the embolic stroke. It happens when a piece of cholesterol and calcium starts to settle in the walls of an artery or on the human heart. The blood flow to the brain eventually stops thus, facilitating a stroke. Few other types of strokes are cerebral hemorrhage, subarachnoid hemorrhage, vacuities and migraine headaches. Vacuities stroke is usually the rarest type of stroke, caused due to inflammation of the blood vessels.