Adam Cairns, the Chief Executive of Cardiff and Vale University Health Board - which runs the University Hospital of Wales - spoke to ITV News this evening.
He told Jonathan Hill that the findings of the report by the Royal College of Surgeons are "troubling, worrying and unacceptable".
He said the primary problem - of getting patients into the hospital - caused cancellations of planned procedures, and needs to be tackled with a "much more resilient plan" in future.
More top news
Through this evening and overnight it will remain cloudy with some persistent rain and drizzle by dawn.
A couple from Wales, who moved to South Africa to live 40 years ago, have been killed on their farmland estate there, police have confirmed.
Our Valleys Correspondent Hannah Thomas has been spending time discovering why the people who live in the Valleys love their communities.