INTRODUCTION
The UK has one of the highest rates of death from heart disease in the world - one British adult dies from the disease every three minutes - and stroke is the country's third biggest killer, claiming 70,000 lives each year.
Heart attacks occur when blood flow is blocked, often by a blood clot, while strokes are caused either by blocked or burst blood vessels in the brain. A range of other conditions, including heart failure, when blood is not pumped properly around the body, and congenital heart defects can also cause long term problems, and even death, for sufferers.
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