Abstract
Purpose
A possible consequence of atrial fibrillation (AF) ablation is the occurrence of organized atrial tachycardias (ATs). ATs after AF ablation (ATAAF) may be more symptomatic than AF itself, thus necessitating catheter ablation. We evaluated the prognostic significance of clinical and invasive characteristics for long-term sinus rhythm (SR) maintenance following ATAAF ablation and assessed the effect of technological developments on these results.
Methods and results
Fifty-six consecutive patients with symptomatic ATAAF participated in the study and 114 ATAAF were revealed (2.04 ± 0.93 per patient). Sixty-eight ATAAF (60%) were macroreentrant and 33 (29%) were microreentrant circuits, while 13 (11%) were focal automatic tachycardias. The mean follow-up was 40 ± 18 months with 34 (61%) patients maintaining SR. Treatment with contact force (CF) catheters and EnSite AutoMap module (n = 11) showed significantly better AT/AF free rates at 1-year follow-up (10/11, 91%) compared with treatment using CF catheters but not AutoMap module (n = 13) (8/13, 62%) and treatment with use of neither of these modalities (n = 32) (16/32, 50%). Among patients with macroreentrant circuits around the mitral annulus or left atrial roof (n = 38), the group treated with complete linear lesions in anatomical isthmuses (n = 25) showed significantly better SR maintenance (19/25, 76%) compared with patients (n = 13) treated by empirical ablation in critical functional areas (6/13, 46%).
Conclusions
Technology advancement contributes substantially to long-term success in SR maintenance, by achieving detailed mapping and more effective ablation of ATAAF. The targeting of macroreentrant circuits by creating anatomical linear lesions appears to provide better results.
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Ioannidis, P., Zografos, T., Vassilopoulos, C. et al. The evolution of mapping and ablation techniques in the treatment of atrial tachycardias occurring after atrial fibrillation ablation. J Interv Card Electrophysiol 60, 493–511 (2021). https://doi.org/10.1007/s10840-020-00759-1
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DOI: https://doi.org/10.1007/s10840-020-00759-1