The charity Cardiac Risk in the Young estimates that every week, at least 12 people aged between 14 and 35 suffer sudden cardiac death – and 1 in 300 may carry the condition.
A leading pathologist has told this programme they believe those figures are an under-estimate.
The mother of one young woman who died is campaigning for grassroots sports clubs to give young athletes – who are potentially most at risk – mandatory heart screening by specialists.
h/t Digital mix guy Spock