Cynon Valley MP Ann Clwyd has called for an inquiry into the levels of care at the University Hospital of Wales - and for Cardiff and Vale University Health Health Board's chair, chief executive and board members to resign.
She complained about the poor treatment her husband received at the hospital, before he died in October 2012.
She is conducting a review into complaints by hospital patients in England, and told our reporter Sarah Hibbard that the situation at the University Hospital of Wales could be compared to Stafford Hospital, where it is thought hundreds may have died due to poor care between 2005 and 2008.
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Feeling humid with heavy showers and thunderstorms moving north overnight into Sunday.
Four people, including three children, were taken to hospital to be checked for smoke inhalation.
Heavy rain and thunderstorms will affect many parts of Wales this weekend - particularly during Saturday evening.