It's one of the biggest killers in the UK. Every year, seventy-six thousand people die following a heart attack.
But many of these deaths could be avoided if the public was more aware of the life-saving equipment that's in our village halls, gyms and work-places.
That's the view of South Central Ambulance Service who're raising awareness of difibrillators in a new campaign.
They want more of us to know how to use them and feel confident in doing so. Juliette Fletcher reports from Wantage on the life-saving technology that we can all use.
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Forecast for tonight and tomorrow in the west of the region
Forecast for tonight and tomorrow in the east of the region
It's feared those who have been attending the centre for over a decade, may have no where to go this Christmas.