Half of us in the dark over heart health
Less than half of people know whether they have a family history of heart disease, a charity has said.
A poll by Cardiomyopathy UK found that 54% are unaware whether the problem runs in their family.
The charity said it was "essential" for families to discuss the issue, so people have a better chance of being identified before tragedy strikes.
Meanwhile, the charity's survey of 2,000 UK adults also found that 31% claim they had never been asked by a doctor if they have a history of any health problems or diseases.
Its new awareness campaign is calling on people to learn about their family history of heart disease and recognise symptoms.
"It's essential that families start talking to each other about heart disease within the family", said Joel Rose, chief executive of Cardiomyopathy UK.
The charity estimates that the condition affects more than 160,000 people in the UK.