The mother of teenage horse rider Olivia Inglis held her daughter's hand as a medic "struggled" to operate his equipment following a fall, a Sydney inquest has heard .

Charlotte Inglis, a highly respected rider in her own right, told the NSW Coroners Court today she had walked the cross country course at an equestrian event in Scone with her 17-year-old daughter twice before Olivia's accident in March 2016.

They were concerned by five of the jumps "as soon as we saw them", including the jump at which the teenager died, particularly with the jumps' slim rails, deceptive appearance and absence of a ground line.

A medic who attempted to save the life of Olivia Inglis, 17, after she fell during an equestrian event 'struggled to operate his equipment', an inquest in Sydney has heard following her death. (AAP)

Ms Inglis discussed her worries with Olympic silver medallist Shane Rose as they walked with Olivia to the event's warm-up area.

When the radio call came through that there had been a serious fall, Ms Inglis said she knew immediately it was Olivia and rushed to her side.

"When I walked towards her I asked (medic) David Keys if she was dead because she had her eyes wide open," she said.

The parents of Olivia Inglis, Charlotte and Arthur Inglis, were in attendance at the inquest today. The teen's mother said she had voiced concerns with the course her daughter was riding on, before she performed. (AAP)

"He said 'No she has a faint pulse'. Mr Keys was struggling to work his equipment. I sat beside them and held her hand."

Ms Inglis said Mr Keys was "fiddling" with a breathing machine - pulling it in and out.

The inquest heard a doctor did not arrive until 20 minutes after the accident.

Ms Inglis and her husband had no idea Equestrian Australia had stopped providing licensed paramedics at events.

After falling from her horse over a jump during the event, a medic told her mother she had a 'faint pulse'. (9news)

"We had no idea that we had a paramedic that was unable to use his equipment," she said.

"We had always been under the impression that we had the NSW Ambulance service.

"(David Keys) was not a trained ambulance officer. He was faced with a dire situation."

A medic did not arrive to Olivia's side for 20 minutes following her serious fall in the event, the inquest was told. (AAP)

The 17-year-old comes from an esteemed family in the Australian horse industry. The Inglis family operates the country's leading thoroughbred auction site, established more than 150 years ago.

Olivia's death came just weeks before 19-year-old Caitlyn Fischer was similarly killed during an April 2016 eventing competition in Sydney.

Deputy state coroner Derek Lee is examining the circumstances surrounding both tragedies in a two-week inquest at the coroners court at Lidcombe.

Ailsa Carr and Mark Fischer, parents of Caitlyn Fischer, were also in attendance at the inquest. (AAP)

Ms Inglis today said there needed to be a change in the culture of eventing, with riders and coaches encouraged to speak up if they had concerns over certain jumps.

She suggested the designer of a course and an experienced rider should walk the route prior to an event and provide information on jumps and techniques to competitors through an already available app.

"We need more transparency in our sport. We need to be able to make informed decisions on whether we want to jump a course."