RT Journal Article T1 Is HATCH score a reliable predictor of atrial fibrillation after cavotricuspid isthmus ablation for typical atrial flutter? A1 García Seara, Francisco Javier A1 Gude Sampedro, Francisco A1 Martínez Sande, José Luis A1 Fernández López, Xesús Alberte A1 Rodríguez Mañero, Moisés A1 González Melchor, Laila A1 Álvarez Álvarez, Belén A1 Iglesias Álvarez, Diego A1 González Juanatey, José Ramón K1 Atrial flutter K1 Cavotricuspid isthmus ablation K1 Atrial fibrillation K1 HATCH K1 CHA2DS2VASc AB Objective: We determined the effectiveness of the HATCH score in patients with typical atrial flutter (AFl) undergoing cavotricuspid isthmus (CTI) ablation to predict long-term atrial fibrillation (AF). Methods: We conducted an observational retrospective single-center cohort study including all patients admitted to our hospital for a CTI ablation between 1998 and 2010. The patients were divided into four categories: 1) newonset AF (no prior AF and AF during follow-up (FU)); 2) old AF (prior AF and no AF during FU); 3) prior and postAF (AF prior and post CTI ablation); and 4) no AF.Results: Four hundred and eight patients were included. In patients without prior AF, the hazard ratio (HR) for new-onset AF during FU was 0.98 (CI 95%: 0.65–1.50; p = 0.95) and 1.00 (CI 95%: 0.57–1.77; p = 0.98) for HATCH ≥ 2 and HATCH ≥ 3, respectively. In patients with prior AF, the HR for AF was 1.41 (CI 95%: 0.87–2.28;p = 0.17) and 1.79 (CI 95%: 0.96–3.35; p = 0.06), for HATCH ≥ 2 and HATCH ≥ 3, respectively. Left atrial enlargement was positively correlated with the occurrence of AF during FU, especially in the subgroup without prior AF, which had a HR of 2.44 (CI 95%: 1.35–4.40; p = 0.003), a HR of 2.88 (CI 95%: 1.36–6.10; p = 0.006) and a HR of 3.68 (CI 95%: 1.71–7.94; p = 0.001), for slight, moderate and severely dilated left atrial dimension, respectively, compared with a normal value.Conclusions: HATCH score did not predict AF in patients with typical AFl who underwent CTI ablation. Basal left atrium dimension could help predict new-onset AF. PB IJC Heart & Vasculature SN 2352-9067 YR 2016 FD 2016-06-01 LK http://hdl.handle.net/10347/15868 UL http://hdl.handle.net/10347/15868 LA eng NO García-Seara J, Gude Sampedro F, Martínez Sande JL, et al. Is HATCH score a reliable predictor of atrial fibrillation after cavotricuspid isthmus ablation for typical atrial flutter? International Journal of Cardiology Heart & Vasculature. 2016;12:88-94. doi:10.1016/j.ijcha.2016.05.006. DS Minerva RD 28 abr 2026