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the heart, blood and blood vessels work together to service the cells of the body.

a coronary angiogram is the most accurate diagnostic test for a range of heart problems, including coronary heart disease.

although blocked blood vessels can cause both coronary heart disease and some types of stroke, stroke is not the same as heart disease.

risk factors for heart disease include smoking, diabetes, obesity, family history and age.

giant cell arteritis is inflammation of the arteries that can cause sudden blindness in one or both eyes.

the heart is about the size of a clenched fist and lies in the middle of your chest, behind and slightly to the left of your breastbone.

hypertension, or high blood pressure, can increase your risk of heart attack, kidney failure and stroke.

angina attacks can be prompted by exertion or physical exercise, when the hard-working heart muscle requires greater amounts of oxygen.

smoking is thought to be a factor in age-related macular degeneration and blindness.

some children acquire a heart problem after an illness in childhood, and this is called an acquired heart defect.