Infarction or Ischaemic stroke are both names for a stroke caused by a blockage in a blood vessel in the brain. This is the most common type of stroke. Blockages can be caused by a blood clot (Thrombosis) forming around fatty deposits in the blood vessels of the brain. Alternatively a blood clot or fatty plaque formed elsewhere in the body breaks off which then travels to the brain where it blocks a blood vessel (Embolus). These fatty deposits are known as Atheroma or Atherosclerosis. If the person has a history of heart disease, heart attacks or heart valve problems they have an increased risk of this type of stroke. The size and location of the blockage affects the kind of symptoms and problems the person may have.