DOG The Bounty Hunter lost his wife Beth to cancer in 2019.
Three months later, the 66-year-old reality television star learned he was facing his own "life-threatening condition."
- whose real name is Duane Chapman - was hospitalized for chest pains in September 2019, after of complications from throat cancer in June.
The Dog’s Most Wanted star was told he was suffering from a pulmonary embolism in the heart - a “life-threatening” condition in which one or more arteries has been blocked by blood - two weeks later.
He was diagnosed on , who gave the bail bondsman a stern wake-up call about his diagnosis.
“You’re a ticking time bomb,” Dr. Oz, who went to visit Dog at his Denver home, told him.
“You’re not going to be here with the heart the way it is right now," he told the father-of-12.
"Fear of death is normal. I’m surprised you don’t fear death when you’re chasing after convicts. But when you run away from doctor, that means you have to do your own doctoring," Dr Oz said.
“They found on the right lung a blood clot,” Dog told , at the time. He added: “It was scary.”
The star - who is now - is now on blood thinners as he continues his road to recovery, he told the publication.
Chapman was experiencing "all the signs and symptoms" of a heart attack, according to Dr Oz, speaking to , and that "finally, after numerous efforts, we got the testing, proved what he had, now he's in treatment."
"He has completely changed his life. He used to smoke four packs [of cigarettes] a day - it started when he was aged 12," he said.
Now, Chapman is down to just one pack a day, Oz said.