Some media stories have indicated that caffeine can cause a specific, unusual heartbeat pattern (i.e., an arrhythmia), atrial fibrillation (AF). AF is a type of arrhythmia that can cause chest pain, dizziness, and fatigue. However, these media stories have been based on anecdotal case studies of individual people. When examining the data from observational research and large cohort studies, the current evidence shows that neither caffeine nor coffee is likely to increase the risk of atrial fibrillation.[1][2][3][4] However, people with heart problems should seek advice from their doctor concerning caffeine intake.
Does caffeine ingestion increase the risk of atrial fibrillation?
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•Last Updated: May 16, 2025
Current evidence from observational and cohort studies suggests that caffeine and coffee are unlikely to increase the risk of atrial fibrillation, despite some media reports that have linked caffeine to this arrhythmia. However, individuals with heart problems should consult their doctor on the topic of caffeine consumption.