Good Morning Britain host Richard Madeley was "concerned" for Homes Under the Hammer presenter Martin Roberts before he was rushed to hospital last week, he revealed on Monday.
Martin joined Richard and Susanna Reid on the ITV show on Monday to detail his life-or-death scare, revealing his heart was being "strangled" by liquid.
The host recently revealed he'd learned from doctors he was suffering from a cardiac tamponade, when extra fluid builds up around the heart and puts pressure on it - preventing it from pumping properly.
Martin is recovering in hospital following the close call, as what started as chest pains led to an emergency operation - with him revealing he could have had "hours to live".
Speaking on GMB on Monday, Richard told him: "I have to say to you Martin, when Susanna and I spoke to you when you were in Medyka about a month ago, we spoke after the show and we were a bit concerned about you.
"You had driven pretty much non-stop across Europe to get there, and although you gave a very good account of yourself you looked exhausted. You then came home and this terrible health crisis just suddenly fell out of a clear blue sky."
Martin said: "I am aware of the signs of a heart attack, which is those things but with tingling and things. So like a bloke I thought I'll just make it through the week.
"By the time it got to Tuesday, Wednesday, I was feeling so rubbish that my wife took me to A&E, and basically I was rushed through A&E and to cut a long story short, they found that I'd actually got water or liquid around my heart, which was compressing the heart to a point where at any point it could have stopped.
"Unlike a normal heart attack there is nothing you can do about it. You can't do the whole defibrillator or chest massage, cos the heart itself is literally being strangled.
"So within three to four hours I was on an emergency operating ward, having a tube put into this sack around my heart and they drained off a litre and a half of fluid that was literally sort of strangling myself."
Speaking of the "death-giving" liquid that was drained from his chest, he added: "They literally saved my life Richard."
Martin initially shared the news on Twitter in a video on Thursday, with the caption: "So. Bit of a shocker. Thankfully I’m here to tell the tale…"
He then said: "Well, I have to say this isn’t where I expected to be watching Homes Under the Hammer. Little bit of good news, little bit of bad news. I ended up in hospital in Bath yesterday.
"I had a few chest pains and just feeling generally lousy, so I was brought in here and turns out I had a massive amount of fluid all around my heart, which was actually stopping my heart working.
"Had they not got rid of it, which they did in an emergency operation last night, then it’s sort of quite serious, like, hours to live kind of c***. So here I am, still around, thank goodness, thank god and angels, all those things."
Martin went on: "There’s lots of other complicated things that have happened as a result, but we will work through those, and I’ll keep you updated. Meanwhile, there’s a good TV show on that I think I’ll watch here."
Good Morning Britain airs weekdays at 6am on ITV and ITV Hub.
