Antioxidant Drugs in the Prevention of Postoperative Atrial Fibrillation: A Literature Review
Abstract
Background: Post-operative atrial fibrillation (POAF) is a prevalent complication after cardiac surgery, affecting 20-50% of patients and linked to increased morbidity and healthcare costs. Given the central role of oxidative stress in POAF pathogenesis, this review evaluates the efficacy and evidence base of antioxidant drugs for POAF prevention.
Methods: A narrative literature review was conducted. We searched PubMed, Scopus, and Web of Science up to April 2025 for studies on antioxidants and POAF prevention. The focus was on randomized controlled trials (RCTs), their meta-analyses, and key mechanistic studies.
Results: Twenty-eight relevant studies were included. Antioxidants, including N-acetylcysteine (NAC), ascorbic acid (vitamin C), L-carnitine, crocin, alpha-lipoic acid, coenzyme Q10, vitamin E, berberine, selenium and melatonin, were evaluated. NAC and vitamin C showed the most consistent benefit, with meta-analyses reporting significant reductions in POAF risk (e.g., pooled RR 0.69, 95% CI 0.52–0.91 for NAC; OR 0.44, 95% CI 0.32–0.61 for vitamin C). Evidence for other agents was less robust, often based on single-center trials or showing contradictory results (e.g., selenium, melatonin). Mechanisms involve ROS scavenging, anti-inflammatory effects, and improved mitochondrial function.
Conclusion: Current evidence supports a potential preventive role for specific antioxidants in POAF, particularly NAC and vitamin C. However, significant heterogeneity, contradictory findings for several agents, and a lack of large multicenter RCTs preclude firm clinical recommendations. Antioxidant therapy should currently be considered investigational. Future high-quality trials are needed to establish optimal agents and dosing for clinical practice.
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| Files | ||
| Issue | Vol 13, No 4 (Autumn 2025) | |
| Section | Review Article(s) | |
| Keywords | ||
| Surgery POAF Arrhythmia Oxidative stress Atrial Fibrillation Antioxidants | ||
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