Millions at risk of ‘silent killer’ that triggers heart attack and stroke but don’t realise – are you?

ATRIAL fibrillation is three times more common than previously thought, scientists say.

Experts initially believed the condition – which causes a rapid, irregular heartbeat and can trigger heart attacks and strokes – affected just a small proportion of the population.

But new estimates from the University of California San Francisco suggest almost five per cent of people have it ...