Heart failure with reduced ejection fraction (HFrEF) in the presence of atrial fibrillation (AF) is common, with concerns AF recurrence will precipitate acute decompensation. However, the impact of AF recurrence following catheter ablation (CA) on HF is not well understood. We sought to examine the clinical outcomes and hospitalisation patterns in AF HFrEF patients following CA. This multicentre study reports the re-admission outcomes for patients with AF and HFrEF (LVEF≤40%) following CA. 231 patients (60.5±11.1years, 37 females, mean LVEF 30.7±7.1%, persistent AF 87.9%) with AF and HFrEF underwent CA. At 3.0 years follow-up, recurrent AF occurred in 120 (51.9%) and complete LV systolic recovery (LVEF≥50%) in 125 (54%) patients. There were 366 hospitalisations amongst 123 patients: 240 cardiac and 126 non-cardiac. Arrhythmia related hospitalisations occurred in 179: 151 recurrent atrial arrhythmia without HF, 4 AF with HF, 3 supraventricular tachycardia and 21 ventricular arrhythmia. Other cardiac hospitalisations (61) included: HF without AF recurrence (24), cardiac device insertions (24), ischemic heart disease (8), pericarditis (3) and cardiac valvular surgery (2). On univariable analysis, the absence of LVEF recovery post ablation (OR=1.32, 95% CI=1.11-12.55 P=0.03), persistent AF versus paroxysmal AF recurrence (OR=1.76, 95% CI=1.21-27.72 P=0.03), ischemic cardiomyopathy (OR=3.62, 95% CI=1.16-11.30 P=0.02), and furosemide use (OR=4.96, 95% CI=1.55-15.91 P<0.01) were associated with future HF hospitalisation. After catheter ablation, it is uncommon for patients with AF and HFrEF to present with recurrent AF and HF, but more commonly present with HF without AF, or AF without HF.