"We found Greg was unconscious at that point but he had cardiac output,his heart was actually beating,"Mr Parcell said.
Ms Jones said she had never saved someone's life outside the hospital before.
A 2006 file photo of The Wiggles,featuring Murray Cook (Red Wiggle),Greg Page (Yellow Wiggle),Jeff Fatt (Purple Wiggle),and Anthony Field (Blue Wiggle).Credit:AP
"It's a bit surreal. I do things like that every day at work,I didn't expect to do that without equipment and everything like that."
While Ms Jones was able to draw on her medical experience to use the defibrillator,NSW Ambulance Commissioner Dominic Morgan said people should know the lifesaving equipment is"absolutely not"just for medically trained people to use.
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"They are there for anyone to use,they are totally safe,they will not defibrillate the patient unless the machine recognises it,"he said.
"You just have to have a go,and you may just save a life as we saw when Grace got up and had a go."
Dr Morgan said it was sadly"uncommon"for paramedics to arrive at the scene of a cardiac arrest to find a defibrillator on site,and he would like to see more venues invest in one.
"When combined with CPR,they are absolutely lifesaving equipment and can be purchased for as little as $1500-$2500."
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When it comes to treating cardiac arrests,"time is of the essence",he said."Every minute that your heart is stopped the chances of surviving the event reduce by 7-10 per cent.
"So what that means in practice is if we’re 10 minutes away there’s a very,very low likelihood of people surviving."
He said the survival rate for cardiac arrests outside hospital was about 12 per cent in NSW,a figure that could be greatly improved if more defibrillators were available,along with people willing to jump in and try CPR.
While he would always recommend people do a CPR course,Dr Morgan said people don't need any experience to give it a go.
"[It is] just as important to make the phone call to triple zero and be talked through it by an emergency medical call taker,"he said.
Bushfire relief show goes on
The band carried on with its planned second show at Castle Hill RSL on Saturday night with Emma Watkins,the current Yellow Wiggle,taking Page's place.
"Let's raise the roof tonight and do it for Greg whilst raising funds for the Australian Red Cross and WIRES,"the group said in a social media post on Saturday.
Page left the children's band in 2006 due to poor health and returned for a second stint in 2012.
In 2006 he revealed he was suffering from orthostatic intolerance,which caused problems with the function of his heart when he was standing.
With AAP