Before a heart attack occurs, there may be warning signs.
Take a look at these now that it's Heart Health Month. Everyone needs to be able to recognise these signs.
In men, this usually involves central chest discomfort or pain of a crushing, heavy nature (this is called angina), which is brought on by exertion.
But in women, the warning signs may be more vague and confusing.
Take a look at the sketch below to see which warning signs, in men and women respectively, may signify that a heart attack is on its way:
(iStock images adapted for Health24, September 2009)
Read more:
Women and heart disease
What is a heart attack?