Khloe Kardashian was warned Lamar Odom only had four hours to live.
The 'Keeping Up With the Kardashians' star flew to her estranged husband's hospital bedside last month after he was found unconscious in a Las Vegas brothel and she found the dash to be with him "terrifying".
She recalled: "It's a horrible call to get.
"Getting to the hospital and knowing he's in a coma and having to run these tests or make medical decisions - it's terrifying."
The 36-year-old sportsman woke from his come after three days and Khloe - who recently put her divorce from Lamar on hold - found it very "stressful" being in charge of making decisions on his medical treatment.
Speaking on the 'Today' show, she said: "You have to make risk-and-reward decisions.
"Like, OK, well, there's an 80 percent chance if we do this operation, he might pass away. But also if we don't do it, there's a 90 percent chance he'll pass away.
"Just having to make these executive decisions is really hard, I think on anybody. So it was definitely probably one of the most emotionally stressful times ever in my life."
Though Lamar is slowly getting back to health, the 31-year-old beauty admitted it will be some time before he is fully recovered.
She said: "He is learning how to walk again and learning ... cognitive therapy and speech therapy.
"They think, like, within a year and a half to two years that, mentally, he might be fully recovered. But they don't know."