At the University of Pittsburgh Medical Centre (UPMC), it came as a bolt out of the blue seven years ago in the form of the tycoon Denis O’Brien. In the space of a few weeks, one of the world’s biggest healthcare groups found itself ousted as operator and majority shareholder in the Beacon Hospital in Sandyford in south Dublin. It was an unfortunate ending for UPMC, which had rescued the hospital from the abyss and saved hundreds of jobs in the middle of the financial crash. How this all happened is a fascinating tale. It is a story that also…