» Articles » PMID: 38302192

Incidence and Patterns of Atrial Fibrillation After Catheter Ablation of Typical Atrial Flutter-the FLUTFIB Study

Abstract

Aims: In patients with atrial flutter (AFL), ablation of the cavotricuspid isthmus (CTI) is a highly effective procedure to prevent AFL recurrence, but atrial fibrillation (AF) may occur during follow-up. The presented FLUTFIB study was designed to identify the exact incidence, duration, timely occurrence, and associated symptoms of AF after CTI ablation using continuous cardiac monitoring via implantable loop recorders.

Methods And Results: One hundred patients with AFL without prior AF diagnosis were included after CTI ablation (mean age 69.7 ± 9.7 years, 18% female) and received an implantable loop recorder for AF detection. After a median follow-up of 24 months 77 patients (77%) were diagnosed with AF episodes. Median time to first AF occurrence was 180 (43-298) days. Episodes lasted longer than 1 h in most patients (45/77, 58%). Forty patients (52%) had AF-associated symptoms.Patients with and without AF development showed similar baseline characteristics and neither HATCH- nor CHA2DS2-VASc scores were predictive of future AF episodes. Oral anticoagulation (OAC) was stopped during FU in 32 patients (32%) and was re-initiated after AF detection in 15 patients (15%). No strokes or transient ischaemic attack episodes were observed during follow-up.

Conclusion: This study represents the largest investigation using implantable loop recorders (ILRs) to detect AF after AFL ablation and shows a high incidence of AF episodes, most of them being asymptomatic and lasting longer than 1 h. In anticipation of trials determining the duration of AF episodes that should trigger OAC initiation, these results will help to guide anticoagulation management after CTI ablation.

References
1.
Lee Y, Hyun D, Jung B, Cho Y, Lee S, Shin D . Left atrial volume index as a predictor for occurrence of atrial fibrillation after ablation of typical atrial flutter. J Cardiol. 2010; 56(3):348-53. DOI: 10.1016/j.jjcc.2010.07.006. View

2.
Chen K, Bai R, Deng W, Gao C, Zhang J, Wang X . HATCH score in the prediction of new-onset atrial fibrillation after catheter ablation of typical atrial flutter. Heart Rhythm. 2015; 12(7):1483-9. DOI: 10.1016/j.hrthm.2015.04.008. View

3.
Valles E, Marti-Almor J, Grau N, Casteigt B, Benito B, Cabrera S . Influence of PACE score and conduction disturbances in the incidence of early new onset atrial fibrillation after typical atrial flutter ablation. J Cardiol. 2021; 79(3):417-422. DOI: 10.1016/j.jjcc.2021.10.012. View

4.
Hsieh M, Tai C, Chiang C, Tsai C, Yu W, Chen Y . Recurrent atrial flutter and atrial fibrillation after catheter ablation of the cavotricuspid isthmus: a very long-term follow-up of 333 patients. J Interv Card Electrophysiol. 2003; 7(3):225-31. DOI: 10.1023/a:1021392105994. View

5.
Li J, Xie H, Chen Y, Cao Z, Tang Q, Guo X . Risk of New-Onset Atrial Fibrillation Post-cavotricuspid Isthmus Ablation in Typical Atrial Flutter Without History of Atrial Fibrillation. Front Physiol. 2021; 12:763478. PMC: 8669788. DOI: 10.3389/fphys.2021.763478. View