Avoiding Coffee After Cardioversion is a Fib: The DECAF Verdict

Should I stop drinking coffee? For years, we’ve said yes — or at least probably. But that advice was built on zero randomized evidence. Observational data had been leaning the other way for years. Nobody actually ran the trial.Until now. The DECAF trial — Does Eliminating Coffee Avoid Fibrillation? — is the first randomized clinical trial to directly test caffeine in AFib patients after cardioversion. 200 patients. 5 hospitals across the US, Canada, and Australia. 6 months of follow-up. The coffee group had 47% recurrence. The abstinence group: 64%. Hazard ratio 0.61. That’s a 39% lower risk of recurrence with p = 0.01.This video walks through the PICO, study design, key demographics, results, adverse events, and what it means for how you counsel patients starting today.━━━━━━━━━━━━━━━━━━━━━━━━━━━━⚕️ CLINICAL TAKEAWAY• Stop routinely advising caffeine restriction in AFib patients after cardioversion• If a patient reports coffee as a personal trigger, that’s a different conversation — but it’s the exception, not the rule• This applies to naturally occurring caffeine at normal intake levels. Do not extrapolate to energy drinks or high-dose synthetic caffeine• Paroxysmal AFib was not studied — findings are specific to persistent AFib after cardioversion━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━🔗 LINKS & RESOURCESFull paper: Wong CX 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.2025.21056ClinicalTrials.gov: NCT05121519⚕️ ABOUT DISPENSE AS WRITTENEvidence-based medicine without the fluff. Every video ends with the Castelli Coefficient — a verdict that incorporates study design, statistical validity, and clinical applicability. No pharmaceutical sponsorships. No conflicts of interest. Just the data.Gregory Castelli, PharmD, FCCP, BCPS, BC-ADM, CDCESAssociate Professor,Editor-in-Chief, PURL (Primary care Updates in Research and Literature) Series📱 FIND USYouTube: @dispenseaswrittenInstagram / TikTok: @gregcastellipharmdX / Twitter: @gregcastellirxEmail: [email protected]━━━━━━━━━━━━━━━━━━━━━━━━━━━━⚠️ LEGAL DISCLAIMERThe content provided in this video is for educational and informational purposes only. It is intended for healthcare professionals and medical students as a supplement to — not a substitute for — clinical judgment, professional training, and the individualized care of patients.Nothing in this video constitutes medical advice, and it should not be used as the basis for any clinical decision regarding an individual patient. Always consult current clinical guidelines, institutional protocols, and your own clinical judgment when making treatment decisions.Gregory Castelli, PharmD, is speaking in his personal capacity as an educator. The views expressed do not represent the official positions of the University of Pittsburgh, its School of Medicine, or any affiliated institution.This channel has no affiliation with, and has received no funding or compensation from, any pharmaceutical manufacturer, device company, insurance company, or other commercial entity with a financial interest in the content discussed.Use of trade names is for identification purposes only and does not constitute endorsement.━━━━━━━━━━━━━━━━━━━━━━━━━━━━#AFib #DECAF #cardioversion #cardiology #EBM #primarycare #familymedicine #internalmedicine #medicaleducation #dispenseAsWritten #CastelliCoefficient