It's been described as a system stretched to breaking point that's putting the lives of young children at risk.
Last night we heard exclusive interviews from surgeons working inside our children's heart units.
They told us they were frustrated that the results of a decade-long review, which was set up to improve childrens heart services, had been put on hold after the Government ordered an independent review.
Today that review panel was at the Freeman Hospital, in Newcastle.
It looks after youngsters from across our region and is once again fighting for survival.
You can see the full report from Kenny Toal below.
An independent panel investigating a decision to close some children's heart units and create centres of excellence is at the Freeman Hospital in Newcastle.
The Children's Unit, which looks after the region's young people, was chosen as the Northern centre of excellence - but now that decision is on hold.
You can see the lunchtime update on that from Kenny Toal below.
An independent review panel is visiting the Children's Heart Unit at the Freeman Hospital in Newcastle later.
They are investigating a decision, made earlier this year, to close some hospitals and create centres of excellence.
It is part of a move to improve the service and concentrate expert surgeons in bigger units.
The panel was ordered to carry out the review by the Department of Health.