Homes Under The Hammer presenter Martin Roberts admitted he is still struggling to cope with the health scare.
It comes after the 59-year-old revealed he was minutes from death after being rushed to the hospital last year when he experienced severe chest pains.
Doctors discovered he had pericardial effusion, which is a build-up of fluid around the heart and needed life-saving surgery.
Addressing the impact on his mental health, Martin admitted it is difficult to come to terms with his health woes.
“I have struggled quite badly since I nearly died last April,” he told The Mirror. “It was scary. I’m not young, but I’m not old, and to suddenly have your life come within a couple of minutes of ending, you do play the ‘what ifs?’.”
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He continued: “The health recovery I think is probably a lot quicker than the mental recovery. The mental recovery is that fear that what happened, will it happen again? Suddenly, it’s a Monday morning, am I going to die?
“That slightly irrational fear, but when you’ve been through what I went through it’s a hard thing to move on from.”
The BBC star has since sought help as he turned to the new E4 show, The Big Celeb Detox, which airs on Monday night.
Over the course of three weeks, the property expert alongside celebrities including Kerry Katona and the late Queen’s cousin Princess Olga Romanoff, tackled a string of weird and wacky therapies designed to cleanse the mind, body and spirit.
From lying in graves to drinking their own urine viewers will see him tackle family constellation therapy where fellow celebs role played moments from his life in a ceremony that claims to “awaken ancestors and welcome them”.
Last month, Martin opened up about the impact of his health scare one year on.
He told Express.co.uk: “The wondering what’s going on. The fear of what’s happening to you illness-wise.
“Is this how it’s going to be forever?”
He continued: “Just before I went into hospital I was like an old man having to walk two or three steps and then having to stop. I would pant and wheeze and have to sit down.
“You go through this mindset that this is ok when it’s not ok at all.
“So looking back you have this build up and when it all happens there is this elation after that you found out what it was and you were in the right place at the right time.”
Medics had to perform life-saving surgery to remove fluid that was constricting his heart muscle.