What causes your heart and circulatory system to go wrong?
Problems with your heart and circulatory system, including heart attack, angina and stroke can occur when your arteries become narrowed. This is caused by a gradual build-up of fatty material (called atheroma) within the blood vessel walls. In time, your arteries may become so blocked that they cannot deliver enough blood to your heart or brain, which can lead to a heart attack, stroke and vascular dementia.
