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Over 80,000 people between the age of 15 to 25 could be living with an undiagnosed heart condition - that's according to estimates given to us by the British Heart Foundation.

The charity told us around 83,000 people in this age bracket have a faulty gene which puts them at an unusually high risk of developing heart disease or dying suddenly at a young age.

Many of those people with faulty genes will never have any issues with their heart, but some will only discover they've got a problem when they suffer a cardiac arrest.

William Njobvu has been to meet some of those affected.