Heart disease is caused by the blood supply being blocked or slowed by a build-up of fatty tissues in the arteries.
It is one of the UK's biggest killers in terms of groups of diseases, with someone dying from a form of heart disease every few minutes.
The British Heart Foundation says: “Heart and circulatory diseases cause a quarter of all deaths in the UK, that’s more than 160,000 deaths each year – an average of 460 deaths each day, or one every three minutes in the UK.”
