Mo Farah has revealed that he lost consciousness on his bathroom floor in Portland, Oregan last month.
In another report from OreganLive, there are suggestions that paramedics on the scene were convinced he was having a minor heart attack.
The long distance runner had to be airlifted to hospital over fears that there was something wrong his main organ.
Farah was complaining of stomach pains and was kept in hospital for four days. Doctors still don’t know what caused his sudden collapse, but Farah insists he will be fit for the European Championships in Zurich.
“I was in a bit of pain,” he said, who starts with the 10,000m final on Wednesday night. “But I went for a run, and when I came back from a run I literally collapsed on the floor, completely knocked out.”
The athlete also reported that he had his phone in his pocket after he woke up and immediately rang his training partner, Cam Levins, to tell him what had just happened.
“I was in so much pain from my stomach,” continued Farah. “In the end I had to be airlifted to the main hospital because they thought something was going on with my heart - it was just crazy.”
England and the Commonwealth Games as a whole were disappointed in his decision to not compete in Glasgow.
The final of the 5,000m race would have been fascinating as the British athlete probably could have faced Kenyan gold medallist Caleb Ndiku, who has run two of the seven fastest 5,000m times this year.
“It takes it out of you mentally,” said the 2012 double Olympic champion on his recent scare. “I went back to the UK and had a lot of tests and they found nothing, but I was really struggling. I was nowhere near ready.”
Looking to repeat the success of Barcelona 2010 where he won the 5000m and 10000m event, Farah believes he is in “decent shape" for this year’s European Championship in Zurich.
The athlete finished a disappointing eighth in the London Marathon last April despite training for three months in Kenya in preparation for the event.
Farah will be hoping he does not revisit lacklustre results like in the forthcoming Euros.