There is some good news, however -- Kloots said that he is now off the ECMO machine and his heart and lungs are doing much better.

"Quick update on Nick, he is off the ECMO machine, hallelujah, the surgery went well. The doctor said for Nick's heart and lungs right now, they're in the best condition that they could be," Kloots said.

"He's still on medication to help his heart pump. He's still on the ventilator, obviously, to breathe, but he said this needed to happen for anything else to happen so the fact that he's off is great. The next hours coming up are very important because obviously the heart and lungs are running on their own now for the first time in a couple of days."