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"David played a sort of charity football match. All of a sudden he collapsed and people thought it was a joke but after one or two minutes they realised it was serious," said Gilles Dreyfus, professor of cardiac surgery at the Monaco Heart Centre.
"Fortunately there was one person who had been trained in CPR, because otherwise he would have been brain dead. They then called the emergency services, who arrived eight minutes later with him in cardiac arrest.
"I was speaking to the captain and he was telling me the girl who was in the ambulance only knew where the football field, which isn't an official one but a private one, was because she had seen it that morning and asked somebody what it was.
"If she hadn't then most likely she would not have found it within the timeframe to save him.
"They arrived with him in cardiac arrest, he was shocked four times on site, they were able to restore a normal heart rhythm and within 10 minutes a helicopter arrived to transfer him to Monaco Heart Centre.
