Cold Beverages as a Potential Trigger for Irregular Heartbeat in Atrial Fibrillation Patients

Enjoying a cold drink on a hot day can be refreshing, but for some individuals with atrial fibrillation (Afib), consuming icy beverages may provoke episodes of irregular heartbeat. Recent research highlights that cold drinks, such as iced tea or lemonade, could serve as triggers for Afib, a prevalent heart rhythm disorder. A survey conducted on individuals with Afib revealed that a significant portion reported cold beverages as a catalyst for their arrhythmias. For many, avoiding or modifying their consumption of cold drinks—like warming up beverages, skipping straws, or gulping less—substantially reduced or eliminated their symptoms.

Dr. Grant Simons, Chief of Heart Rhythm Services at Hackensack University Medical Center, explains that while the exact mechanism remains unclear, the vagus nerve—which regulates heart rate—may be stimulated by the sudden temperature change, leading to rhythm disturbances in susceptible people. He notes that this phenomenon is seldom observed but can be significant for those affected. If individuals notice a pattern linking cold drinks to their Afib episodes, consulting a healthcare professional is advisable. Sometimes, simple lifestyle adjustments can make a meaningful difference.

It is important to emphasize that cold drinks are not a universal trigger, and not everyone with Afib will experience this effect. Moreover, experiencing symptoms like heart palpitations, breathlessness, or dizziness warrants prompt medical evaluation. Medical experts such as Riple Hansalia, M.D., caution that while triggers differ among patients, maintaining common sense and seeking medical guidance is essential for managing Afib effectively.

This emerging evidence, published in the Journal of Cardiovascular Electrophysiology, underscores the importance of personalized lifestyle adjustments in arrhythmia management. Further research is needed to fully understand the underlying mechanisms, but awareness of potential triggers like cold beverages can empower patients to better control their condition.

Source: https://medicalxpress.com/news/2025-06-cold-trigger-irregular-heartbeat-people.html