A hard-hitting TV advert will be shown to raise awareness of heart health, as new figures reveal coronary disease claims 5,000 Welsh lives every year.
The advert - part of British Heart Foundation's new campaign 'Fight For Every Heartbeat' - includes the moment footballer Fabrice Muamba went into cardiac arrest during an FA cup match last year.
Heart disease remains the UK's single biggest killer, with one in six men and one in nine women in Wales dying as a result of it.
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The three-day event in the Welsh capital is expected to attract more than 20,000 visitors.