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“Supernatural”'s Mark Sheppard Says He Had '6 Massive Heart Attacks'

The actor said he had "a 100% blockage" in his left anterior descending artery

<p>Derek Storm/Everett Collection</p> Mark Sheppard had six heart attacks, he shared in a new Instagram post.

Derek Storm/Everett Collection

Mark Sheppard had six heart attacks, he shared in a new Instagram post.

Mark Sheppard says he recently survived six heart attacks.

The 59-year-old actor, who is best known for playing Crowley on Supernatural, spoke about his health in a post shared on Instagram Saturday.

“You’re not going to believe this! Was on my way to an appointment yesterday when I collapsed in my kitchen,” Sheppard began the caption of his post alongside a selfie he snapped of himself in a hospital bed.

The English actor then noted that he had “six massive heart attacks” and was “brought back from [the] dead 4 times,” before learning that he “had a 100% blockage in my LAD”

The LAD, or left anterior descending artery, is the largest coronary artery that carries nearly 50% of all blood carried by the coronary circulation, per the National Library of Medicine.

Related: Jensen Ackles Says the End of 'Supernatural' Was a 'Really Sad Goodbye' After 15 Years

Sheppard then referred to the heart attack by its colloquial name — “The Widowmaker” — before expressing his gratitude to everyone who helped him through the experience.

“If not for my wife, the @losangelesfiredepartment at mullholland and the incredible staff @providencecalifornia St Joseph’s - I wouldn’t be writing this,” he said. “My chances of survival were virtually nil.”

“I feel great. Humbled once more,” Sheppard added. “Home tomorrow! #spnfamily.”

Related: 24 Photos of Jared Padalecki and Jensen Ackles' 'Supernatural' Brotherly Love Through the Years

<p>The CW / Courtesy: Everett Collection</p> Mark Sheppard as Crowley on CW's 'Supernatural.'

The CW / Courtesy: Everett Collection

Mark Sheppard as Crowley on CW's 'Supernatural.'

Sheppard’s castmate Misha Collins — who portrayed Castiel on the CW series — shared a message of support for the actor in the comments section of his post.

“Mark! You don't need to do the most and biggest every time! 6 heart attacks? 2 or 3 would have been impressive enough,” Collins, 49, wrote.

"You've impressed us, okay. Now stop with this heal up and get back on the road with us,” he continued. “Love you, pal.”

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Several other actors also wished Sheppard a speedy recovery, including Matt Bomer and Supernatural star Felicia Day.

“Glad you’re ok Mark. Sending ❤️,” Bomer, 46, wrote, while Day, 44, said, “Omg mark I am so glad you’re recovering this is awful! Sending all my love to you and the family ❤️.”

Doctor Who and Torchwood actor John Barrowman also penned Sheppard a message, writing, “Mark, WTF…if there is anything you need or I can do just let me know. I am just a small journey away.”

“Please do all they tell you to make yourself heal and get well,” Barrowman, 56, added. “You are a lovely soul and a lovely man. I am sending you lots of love…Jb ❤️❤️❤️.”

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