Evidence Map: Screening for cardiac conditions associated with sudden cardiac death in the young

Every year, hundreds of apparently healthy young people in the UK die suddenly from undiagnosed heart conditions, often genetic, that could have been caught with the right screening. This evidence map, commissioned by the UK National Screening Committee, systematically reviews what is known about sudden cardiac death in people aged 12 to 39. It asks three concrete questions: how common these deaths are, how accurate screening tests are at detecting the underlying cardiac conditions, and whether treating someone who was picked up by screening actually prevents death compared to leaving them unscreened. The map does not generate new data—it takes stock of existing research to reveal where the evidence is strong, where it is thin, and where gaps remain. If the map shows that screening is accurate and effective, it could inform a national screening programme for young people, potentially preventing deaths that currently strike without warning. If the evidence is weak, it will clarify what further studies are needed before any policy change. Either way, the UK NSC gets a clear picture of what is known and what is not.