Now, this heart failure which is due to the ischemia and the stenosis you would call this heart failure due to 'Coronary Artery Disease' which is really just kind of an impairing of the heart's function because of reduced blood supply, because of narrowing of the blood vessels that is Coronary Artery Disease, and because of this disease when this muscle cell in the heart really needs to pump hard maybe because someone's going up a hill or climbing stairs it won't be able to do it because it's not getting enough oxygen.