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.
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Sunday's Pollen for the North East region
Cladding from high-rise flats in 25 local authority areas has now proved to be potentially flammable in the urgent safety review.
Police have shed further light on the crash, which took place in Newcastle while people were celebrating Eid.