Implementing a Mediterranean Diet App in Patients With Atrial Fibrillation

Atrial fibrillation (AF) is associated with inflammation, symptom burden, and reduced quality of life (QoL). While the Mediterranean diet may reduce inflammation, its effects in AF are understudied.

In this study, we aimed to assess the feasibility and preliminary effects of a Mediterranean diet self-monitoring app (Olitor) on inflammation, symptoms, and QoL in patients with symptomatic AF.

We enrolled 12 participants with symptomatic paroxysmal AF in a 3-month single-arm pre-post pilot study; 10 completed. The Olitor app prompted weekly diet tracking and provided tailored feedback. Outcomes included retention, inflammation, AF symptoms, QoL, physical activity, diet knowledge, self-efficacy, and body mass index (BMI).

Retention was 83%. Interleukin-6 and C-reactive protein showed reductions; QoL and BMI improved. Family QoL subdomain (Hedges' g = 0.89) and walking activity (Hedges' g = 0.52) demonstrated large effects. Self-efficacy and diet knowledge increased.

A Mediterranean diet app appears feasible in AF; findings are exploratory and warrant future confirmation.