A 36-year-old man drank a crushed ice beverage fast, got the "brain freeze," and came close to passing out at the wheel. He was severely dizzy, sweating, nauseated, and short of breath, with a pounding chest and a tight throat. The episode lasted two to three minutes. Afterward, he checked his smartwatch and saw it had recorded atrial fibrillation.
Two weeks of outpatient heart monitoring caught nothing. So at his follow-up visit, with a Slurpee on hand, his cardiology team asked him to do it again while they watched.
