We knew Martin Brundle had gone through a medical procedure earlier in the 2016 Formula 1 season after a serious heart issue but we had no idea this happened.

Ex-F1 driver turned Sky Sports F1 commentator Brundle has revealed he suffered a small heart attack while he was covering the Monaco Grand Prix.
Brundle said he fell ill while on his way from the commentary booth to the podium in Monaco to conduct the post-race interviews with the top three drivers.
But, amazingly, despite the small heart attack he went to the podium and conducted the interviews anyway, and none of us even realised it. He even stuck with his Sky Sports commitments too.
Had a medical procedure last week, went extremely well. I won’t be in Montreal but my excellent @SkySportsF1 colleagues will. Every lap live
— Martin Brundle (@MBrundleF1) June 9, 2016
Thanks also to the Cardioligist and surgeon who fixed my serious heart issue 2 weeks ago and gave me confidence to race. I am 20 yrs younger
— Martin Brundle (@MBrundleF1) June 18, 2016
After undergoing the medical procedure, he was forced to miss the Canadian Grand Prix. However, what was even more incredible was the fact he raced at Le Mans a few weeks later.
He raced in the LMP3 class two weeks later and finished second in his class, quite a turnaround after a tough time.
Brundle explained what happened during an interview on the Autosport International stage:
“I had a small heart attack running to do the podium in Monaco. I ended up with a 23mm stent in my left arterial descending. So I didn’t think I could do the race and the cardio guy said ‘yeah, you can do the race, just don’t forget your blood thinners’.”
“I went to Palmersport and did 75 laps in a car and thought ‘yeah, I can do this’. I had bruises coming out of my chest but I thought ‘I love Le Mans, I’m not going to miss this’. I sat at the press conference and there was a 17-year-old and a 19-year-old sitting alongside me and I thought ‘that’s not bad for an old geezer, 57’. We finished second in the race which was unfortunate, not first.”
Brundle should’ve probably skipped the podium interviews after what happened to him, but major props to him for keeping to his commitments.