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- W3186582981 abstract "Perimitral flutter (PMFL) with additional attached loops has not been well described. We characterized PMFL with multiple loops and identified leading and subsidiary circuits within each tachycardia. Between 2016 and 2020, 24 patients were diagnosed with PMFL using the Rhythmia high-density mapping system (Boston Scientific). This study included 13 PMFL patients (age 71 ± 8, 11 male) with multiple reentrant loops on the activation map. A single leading loop was defined when ablation in a single loop terminated tachycardia directly to sinus rhythm. Multiple leading loops were defined when ablation in more than one loop was required to restore sinus rhythm. Double loops were observed in 9 patients and triple loops in 4. The average TCL was 270 ms in PMFL with double loops and 227 ms in those with triple loops. In 9 PMFL with double loops, co-loops were found traversing left PVs (n=5), anterior wall (n=3; Fig.1A), and right PVs (n=1). In 4 PMFL with triple loops, co-loops were found around left PVs (n=3; Fig.1B), LSPV (n=3; Fig.1B), anterior wall (n =1), and RSPV (n =1). We found that in 9 (6 double, 3 triple loops) of 13, PMFL was terminated with ablation in a single loop, confirming “single leading loop” and in 2 of 13, ablation converted PMFL to a different tachycardia, suggesting “multiple leading loops''. Two tachycardias were undetermined due to failed ablation (n=1) and successful ablation at the shared pathway (n=1). When multiple loops co-exist in PMFL they may be dominant or subsidiary. Successful ablation targeting only a single loop suggests that many of these additional loops are subsidiary, and not critical to maintaining tachycardia." @default.
- W3186582981 created "2021-08-02" @default.
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- W3186582981 date "2021-08-01" @default.
- W3186582981 modified "2023-09-26" @default.
- W3186582981 title "B-PO04-101 PERIMITRAL FLUTTER WITH MULTIPLE REENTRANT LOOPS: SINGLE DOMINANT LOOP VS CO-DOMINANT LOOPS" @default.
- W3186582981 doi "https://doi.org/10.1016/j.hrthm.2021.06.795" @default.
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