Women who suffer heart attacks are dying needlessly because they fail to recognise their symptoms and receive poorer care than men, says a British Heart Foundation report.
Over 10 years, more than 8,000 women in England and Wales died unnecessarily after a heart attack, it found.
Experts say there are inequalities in diagnosis, treatment and aftercare.
"Unconscious biases are limiting the survival chances of women," the report warns.
It found that some commonly held myths – such as heart disease and heart attacks only affecting men – meant women were unaware of their risk, and slow to seek medical help.
There is also a misperception that men and women experience completely different heart attack symptoms, but studies suggest that although symptoms can vary from person to person, chest pain is the most common symptom in both men and women.
And younger women do have heart attacks, the report says, which should be taken seriously.
'Seen as a man's disease'
There have been significant improvements in how heart attacks are treated.
In the 1960s, seven out of 10 heart attacks in the UK proved fatal. Today, seven out of 10 people who have a heart attack will survive.
But women are missing out, says Dr Sonya Babu-Narayan, associate medical director of the British Heart Foundation (BHF).
"Heart attacks have never been more treatable.
"Yet women are dying needlessly because heart attacks are often seen as a man's disease, and women don't receive the same standard of treatment as men."
She said studies had "revealed inequalities at every stage of a woman's medical journey, and although complex to dissect, they suggest unconscious biases are limiting the survival chances of women".
The BHF report says that each year around 35,000 women are admitted to hospital following a heart attack in the UK each year – an average of 98 women a day, or four per hour.
In the UK, women are twice as likely to die from coronary heart disease as from breast cancer.
The report found that:
- women often delayed seeking help
- they were more likely to receive an incorrect diagnosis and substandard treatment compared to men
- risk factors, such as smoking and high blood pressure, increase heart attack chances more in women
- the quality of aftercare was also substandard
Chris Gale, professor of cardiovascular medicine at the University of Leeds, led a study which found that thousands of women's lives were needlessly lost in England and Wales after heart attacks, between 2002 and 2013.
"This problem is not unique to the UK," he said.