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Extravirgin olive oil consumption reduces risk of atrial fibrillation: The PREDIMED (Prevención con Dieta Mediterránea) trial

AuthorsMartínez-González, Miguel A.; Toledo, Estefanía; Arós, Fernando; Fiol, Miquel; Corella, Dolores; Salas-Salvadó, Jordi; Ros, Emilio; Covas, María Isabel; Fernández-Crehuet, Joaquín; Lapetra, José; Muñoz, Miguel Ángel; Fitó, Montserrat; Serra-Majem, Lluís; Pintó, Xavier; Lamuela-Raventós, Rosa M.; Sorlí, José V.; Babio, Nancy; Buil-Cosiales, Pilar; Ruiz-Gutiérrez, Valentina ; Estruch, Ramón; Alonso, Álvaro
Fatty acids, monounsaturated
Atria fibrillation
Issue Date2014
PublisherLippincott Williams & Wilkins
CitationCirculation 130: 18- 26 (2014)
AbstractBackground - The PREDIMED (Prevención con Dieta Mediterránea) randomized primary prevention trial showed that a Mediterranean diet enriched with either extravirgin olive oil or mixed nuts reduces the incidence of stroke, myocardial infarction, and cardiovascular mortality. We assessed the effect of these diets on the incidence of atrial fibrillation in the PREDIMED trial. Methods and Results - Participants were randomly assigned to 1 of 3 diets: Mediterranean diet supplemented with extravirgin olive oil, Mediterranean diet supplemented with mixed nuts, or advice to follow a low-fat diet (control group). Incident atrial fibrillation was adjudicated during follow-up by an events committee blinded to dietary group allocation. Among 6705 participants without prevalent atrial fibrillation at randomization, we observed 72 new cases of atrial fibrillation in the Mediterranean diet with extravirgin olive oil group, 82 in the Mediterranean diet with mixed nuts group, and 92 in the control group after median follow-up of 4.7 years. The Mediterranean diet with extravirgin olive oil significantly reduced the risk of atrial fibrillation (hazard ratio, 0.62; 95% confidence interval, 0.45-0.85 compared with the control group). No effect was found for the Mediterranean diet with nuts (hazard ratio, 0.89; 95% confidence interval, 0.65-1.20). Conclusions - In the absence of proven interventions for the primary prevention of atrial fibrillation, this post hoc analysis of the PREDIMED trial suggests that extravirgin olive oil in the context of a Mediterranean dietary pattern may reduce the risk of atrial fibrillation. © 2014 American Heart Association, Inc.
Identifiersdoi: 10.1161/CIRCULATIONAHA.113.006921
issn: 1524-4539
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