Figure 2: Odds ratio for incident HF event. Moderate to severe mitral valve disease and chronic loop diuretic are associated with increased risk of heart failure (HF) events with an odds ratio (OR) (95% confidence interval) of 8.7 (3.3 – 22.6) and 4.8 (2.6 – 9.1) respectively. Class III antiarrhythmic use was associated with a reduced risk of HF events with an OR of 0.2 (0.1 – 0.5). Left atrial pressure (LAP) post ablation and persistent atrial fibrillation (AF) were not associated with HF events with an OR of 1.1 (1 – 1.2) and 0.6 (0.2 – 2.1) respectively.