While a third of people are worried about getting dementia or cancer, only 2% are afraid of coronary heart disease, a survey by the British Heart Foundation has found.
And one in ten adults confessed to not knowing how to look after their hearts.
Coronary heart disease (CHD) is responsible for about 74,000 deaths in the UK each year.
The British Heart Foundation has issued 10 tips to prevent heart disease:
Give up smoking
If you're over 40, take up your free NHS health check
Maintain a healthy weight
Lead an active lifestyle
Ditch the salt
Eat your "five a day" of fruit and vegetables
Cut down on saturated fat
Read food labels to find out if something is healthy for you
Don't drink too much alcohol
Watch food portion sizes.