Local NHS chief has written to Health Secretary Jeremy Hunt urging him to extend the deadline on children's heart surgery unit report.
MPs have called for an investigation into why a "reckless" decision was made to stop children's heart surgery at a Leeds hospital.
The Children's Heart Federation says the interests of management at the LGI have been "put ahead of critically ill children".
MPs are to ask questions in parliament over the handling of the Children's Heart Unit crisis in Leeds. Hull North MP Diana Johnson MP and Pudsey, Horsforth and Airborough MP Stewart Andrew will raise the issue this afternoon.
Mortality rates for all children's heart surgery centres have been released following the temporary suspension of operations at the Leeds unit. It comes following concerns about death rates at Leeds which emerged after Newcastle's Freeman Hospital was chosen as the designated heart surgery centre.
The Freeman was selected over Leeds General Infirmary following the biggest consultation the NHS has ever carried out. However that decision is now on hold after campaigners in Leeds won a high court battle which upheld concerns that the rating system used during the decision process was flawed.
Now, data released by NHS England shows that none of the 10 centres in England breached thresholds for child heart surgery deaths, however Leeds General Infirmary was very close to the alert level. Operations resumed at the unit on Wednesday following a safety review.
The battle over the future of children's heart services has taken a new twist, with public disagreement between leading experts.
A former Government advisor has said he would not send his own daughter for heart surgery in Leeds, but would choose Newcastle.
Following the comment, NHS England stepped in to reassure parents. The Medical Director for the North of England told ITV News Tyne Tees he would have 'no doubt' about using the Leeds unit.
Both facilities are under review as part of a nationwide shake-up.
Watch Helen Ford's report here:
Campaigners fighting to retain children's heart surgery in Leeds, have responded angrily to comments from a medical expert.
Professor Sir Roger Boyle, who is a former Government advisor, said he wouldn't send his own daughter for heart surgery in Leeds but would choose Newcastle instead.
Operations at the Leeds unit were recently suspended but resumed this week.
The NHS Medical Director for the North of England, Mike Bewick, has stepped into the debate saying if he had children who were in this position, he would have 'no doubt' he would take them to Leeds.
Meanwhile, Leeds children's heart unit campaigner Sharon Cheng gave this response to Professor Sir Roger Boyle's remarks:
NHS England has released a statement saying 'immediate safety concerns' at the Leeds Children's Heart Surgery Unit have been addressed.
Following completion of the first stage of the review by an independent clinical team, into paediatric heart surgery in Leeds, NHS England has been given assurances, that the immediate safety concerns raised two weeks ago have been addressed and the unit recommenced surgery on a phased basis earlier this week.
It is the duty of NHS England first and foremost to protect patients, hence we paused surgery at the unit to allow a review of the data and other concerns raised to take place. I and NHS England cannot allow undue risks when it comes to the safety of children.
NHS England originally raised concerns about Leeds General Infirmary because of preliminary data suggesting high mortality, concerns about staffing levels, whistleblowing information from clinicians, and complaints from patients.
– Mike Bewick, Deputy Medical Director of NHS England
A second stage of the review is underway in which we now need to explore some of the wider issues around how the unit operates as a whole. I hope we will soon be able to give the unit a full clean bill of health beyond this immediate reassurance of safety.
Throughout this process our sole concern has been the safety of patients this is why we paused surgery and after assurances why we allowed surgery to re-start.”
Local MPs in Leeds have called for Sir Roger Boyle to leave his role on the children's heart surgery review:
Bruce Keogh calls on Roger Boyle to step down from his role on the children's heart surgery review. Health Secretary must now respond.
It is now clear that #SirRogerBoyle is carrying out a cynical vendetta, he must be relieved from all NHS roles immediately, clear misconduct
Local Conservative MP for Pudsey, Horsforth & Aireborough Stuart Andrew has called comments by Sir Roger Boyle, 'outrageous' after the Department of Health's former National Director for Heart Disease said he would not allow his own daughter to be treated at Leeds General Infirmary:
Have asked for Sir Bruce Keogh to reconfirm his view that surgery in Leeds is safe. The comments by Sir Roger are totally unfair on parents and staff.
Am astounded that he [Sir Roger Boyle] continues to rely on unverified data. Outrageous.
Sharon Cheng, of Save Our Surgery (SOS), which campaigned for surgery to be resumed at Leeds, said:
Sir Roger Boyle's comments of this morning are extremely unhelpful and undermine the progress made over the last few days to begin to rebuild heart patients' families' trust and confidence in the Leeds children's heart surgery unit.
His implication that surgery should not have been resumed at Leeds contradicts everything we have heard from NHS England, the Care Quality Commission and NHS medical director, Sir Bruce Keogh, who have all stated unequivocally that the unit is safe, hence their resumption of surgery.
Sir Bruce himself went on record this week saying he would feel comfortable having his child operated on in the unit.
Let me be absolutely clear - the Leeds unit would not be operating if there were any concerns whatsoever about mortality rates or anything else.
Once again, this is an example of Sir Roger Boyle speaking out without due regard to the necessary process, the verified facts or the implications of his actions on patients and their families.
He is not an impartial party in regards to Leeds and as an adviser to the Safe and Sustainable review, we do question his motives.
Leeds Teaching Hospitals NHS Trust has defended the re-opening of a children's heart unit after Sir Roger Boyle the Department of Health's former National Director for Heart Disease said he would not send his daughter to the unit.
On Monday we announced that we were reopening the children's heart unit at Leeds General Infirmary.
– Leeds Teaching Hospitals NHS Trust spokesperson
All partners were fully in agreement that this was the correct course of action to take and surgery has now resumed.
This was publicly reconfirmed at a meeting of councillors held in Leeds on Wednesday when the deputy medical director of NHS England reaffirmed the view that all the child heart surgery units in England, including Leeds, are safe to undertake surgery.
The CEO of the Leeds Teaching Hospital NHS Trust has spoken out to reassure families about the children's heart surgery unit's reputation.
– Maggie Boyle, CEO Leeds Teaching Hospital NHS Trust
The unit is categorically safe and is as safe as any unit in the country."