In an interview with The Sun newspaper on Sunday, the Prime Minister said he was given "litres and litres of oxygen" to keep him alive.
“It was a tough old moment, I won’t deny it. They had a strategy to deal with a ‘death of Stalin’-type scenario. I was not in particularly brilliant shape and I was aware there were contingency plans in place. The doctors had all sorts of arrangements for what to do if things went badly wrong," Johnson told The Sun.
Earlier, Johnson and his fiancée Carrie Symonds revealed they had named their newborn son Wilfred Lawrie Nicholas Johnson.
The names are a tribute to their grandfathers and two doctors who treated the prime minister in hospital. Wilfred was the name of Boris Johnson’s grandfather and Lawrie was the name of Symonds’s grandfather. The doctors who treated Johnson were both named Nicholas.
The baby was born Wednesday, just weeks after the Prime Minister was discharged from hospital.