Your Heart pumps blood around your body through your arteries and veins. The blood contains oxygen and nutrients that keep your body working. When there's something wrong with your heart or blood vessels, it's known as heart (cardiovascular) disease.
A heart attack occurs when blood flow to a section of the heart muscle becomes blocked. If the blood flow is not restored quickly, the section of the heart muscle dies.
Angina occurs when your heart muscle does not get as much blood and oxygen as it needs. It is a sign of heart disease - however, it can be treated.