According to Canadian Healthcare Network, a new study highlights how cold drinks and foods may trigger atrial fibrillation (AF) episodes in some people, a condition researchers refer to as “cold drink heart.” Over half of the 101 patients studied reported AF episodes soon after consuming something cold—often following physical activity. Common triggers included ice water, smoothies, milk, yogurt, and ice cream.

Avoiding cold food and drink significantly helped, with 86% of participants seeing fewer or no episodes when they stopped consuming them. However, the link isn’t consistent—many could still consume cold items without problems, making the condition unpredictable and hard to diagnose.

Dr. David Vinson, the study’s senior author, and Dr. Peter Lin, a Toronto physician, explained that cold items passing through the esophagus (which is close to the heart) may disrupt the heart’s electrical system. Letting cold drinks warm slightly in the mouth before swallowing might reduce risk.

The study focused on relatively young adults (average age 44.5), mostly men, some of whom may have been predisposed to AF later in life. Despite patient reports, many doctors had previously dismissed the cold-AF connection. Researchers urge medical professionals to take these triggers seriously and work with patients to prevent episodes.

So next time you reach for a slushie or ice cream on a hot day, remember: if you’re prone to AF, a little chill might do more than cool you down—it could shake up your heart rhythm. Sipping smartly will help you feel better.

By Diane Alavie, BSc.Phm