REBECKA Foteades knows firsthand how important it is to learn CPR.
She saved her grandfather Kevin Freeman's life, using CPR on him for 26 minutes after she found him collapsed on the driveway of his Middle Dural home.
She had only completed the Kids' First Aid Australia course days before.
Mrs Foteades believes by using CPR she gave her grandfather a "million per cent" higher chance of living.
"It's about acting quickly," she said. "It's so important to have regular training so you're confident in knowing what to do in an emergency."
Her grandfather said: "Exactly. CPR saved my life. It can't be much more important than that. It's a matter of life and death, especially if you have heart problems or have a swimming pool near young children.
"Mothers need to know CPR. It's crucial because if you leave resuscitation too long it can have a severe mental impact."
Almost 10,000 Australians die of heart attacks each year in Australia, with one life taken every 53 minutes, according to the Heart Foundation.
Dr Ron Tomlins, Mr Freeman's doctor of nine years, said CPR led to his patient's "miraculous" recovery.
But he said CPR technique has changed and it was important now for people to do refresher courses.
"Recent changes in CPR intervention no longer require both breathing and compression," Dr Tomlins said.
"Rather, the focus is on compression only to help the heart continue to function and this in itself helps drive air into the airways. It's important for people to know CPR.
"Here at Castle Hill Medical Centre we train our staff three to four times a year in CPR."
The centre has CPR courses in October.
Details: 9634 5000 or castlehillmedicalcentre.com.au.