A prospective, observational cohort study designed to identify clinical phenotypes and evaluate predictors \& outcomes of functional mitral and tricuspid valve regurgitation in patients with atrial fibrillation. Participant will under go: * Baseline echocardiography * Cpex Echocardiography * Blood test: BNP * 1 year follow up Echocardiography Participants will be stratified into three subgroups: * Atrial Functional MR * Atrial Functional TR * Mixed MR \& TR
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Effective Regurgitant Orifice Area at 1 year
Timeframe: 1 year