In severe cases of hypothermia, rewarming is a treacherous process that poses a substantial risk of cardiac arrest if mismanaged.

FORBES: Public Health

In cases like these, the checklist said, rescue teams were to tell the hospital to prepare for possible cardiac bypass and rewarming.

NEWYORKER: The Checklist

After 72 hours, she was gradually warmed about half a degree per hour for six hours. (If a baby starts showing signs of seizure, rewarming is temporarily halted or slowed.) During rewarming, considered a high-risk period, the medical staff carefully observed her brain for abnormal patterns indicating seizures.

WSJ: Hypothermia Cure for Babies: Cooling Infants to Battle Brain Damage