A Swansea cardiologist has warned that hidden heart defects which can kill young people out of the blue are probably much more prevalent than even doctors realise.
Mark Anderson is helping to brief the UK government on a new chapter in its national service framework on coronary heart disease.
He is working with the pressure group Cardiac Risk in the Young (CRY) to promote screening for people at risk.
Around eight apparently fit and healthy people under the age of 35 suddenly drop dead from undiagnosed heart rhythm defects every week in the UK.
But CRY believes that is an underestimate.
Dr. Anderson has around 70 patients with rhythm disorders.
