Caffeinated coffee may reduce the risk of atrial fibrillation through several proposed mechanisms, including improved autonomic balance, antioxidant effects, and enhanced vascular function. While observational data have hinted at these benefits, randomized trial evidence has been limited. Findings from the DECAF Trial further demonstrate that atrial fibrillation patients do not need to avoid caffeinated coffee—and that it may even help lower their risk of future episodes.

In this interview, Matthew W. Martinez MD, FACC and Gregory M. Marcus, MD, FACC discuss the ‘Does Eliminating Coffee Avoid Fibrillation (DECAF)’ Trial.

Related References:

1. Wong CX, Cheung CC, Montenegro G, et al. Caffeinated Coffee Consumption or Abstinence to Reduce Atrial Fibrillation: The DECAF Randomized Clinical Trial. JAMA. 2026;335(4):317-325. doi:10.1001/jama.2025.21056
2. Marcus GM, Rosenthal DG, Nah G, et al. Acute Effects of Coffee Consumption on Health among Ambulatory Adults. N Engl J Med. 2023;388(12):1092-1100. doi:10.1056/NEJMoa2204737
3. . Kim EJ, Hoffmann TJ, Nah G, Vittinghoff E, Delling F, Marcus GM. Coffee Consumption and Incident Tachyarrhythmias: Reported Behavior, Mendelian Randomization, and Their Interactions. JAMA Intern Med. 2021;181(9):1185-1193. doi:10.1001/jamainternmed.2021.3616