Just one cigarette a day doubles a woman's risk of having a fatal heart attack

Women who smoke as little as one a day are at higher risk of dying suddenly from heart attack and other heart problems, warn researchers.

The risk is doubled compared with women who don’t smoke, and higher for long-term smokers.

A new study suggests women smokers face greater heart dangers than previously thought, even when they appear to be healthy.

But the threat can be reversed within five years if women quit the habit, say Canadian researchers.