CA: Catheter ablation, MT: Medical therapy, RCTs: Randomized controlled trial, AF: Atrial fibrillation, NM: Not mentioned, CFAE: Complex fractionated atrial electrograms. SVC: Superior Vena Cava Isolation, HF: Heart failure, CV: Cardiovascular, ∆LVEF: Change in left ventricular ejection fraction, QOL: Quality of life, ∆MLHFQ: Change in Minnesota living with heart failure questionnaire, Δ6MWT: Change in Six-minute walk test, ∆VO2 max: Maximum rate of oxygen consumption, ∆BNP: Change in Brain natriuretic peptide.