![]() At 1 year of follow-up, 77% were free of atrial tachycardia or atrial flutter and 61% were free of all atrial arrhythmias.įor decades, there was a scientific debate as to whether or not typical atrial flutter was focal or reentrant. Thus, 28/31 (90.3%) terminated with RF energy and/or could not be reinduced after ASC ablation. Median time from initial ablation to AAF termination was 64 s. AAF degenerated to atrial fibrillation in 2/31 (6.5%) with RF and could not be reinduced after ASC ablation. We targeted the ASC and ablation terminated AAF directly in 19/31 (61.3%) and altered AAF activation in 7/31 (22.6%), all of which terminated directly with additional mapping/ablation. Macroreentry atrial flutters took varied pathways, but each had an area of slow conduction (ASC) averaging 16 ± 6 mm (range 6–29) in length. ![]() For every AAF, the entire circuit was identified. Time to create and interpret the UHD-ASM was 20 ± 11 min. For each AAF, 1273 ± 697 points were used for UHD-ASM. I have followed all appropriate research reporting guidelines and uploaded the relevant EQUATOR Network research reporting checklist(s) and other pertinent material as supplementary files, if applicable.Demographics age = 65.3 ± 8.5 years, male = 78%, left atrial size = 4.66 ± 0.64 cm, redo ablation 20/23(87%). I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance). I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as. ![]() Funding StatementĪll relevant ethical guidelines have been followed any necessary IRB and/or ethics committee approvals have been obtained and details of the IRB/oversight body are included in the manuscript.Īll necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived. The authors have declared no competing interest. ![]() Further studies are needed to assess the usefulness of this tool for improving catheter ablation outcomes. Conclusion A low-density and prolonged LAT-Valley in a heterogeneous low-voltage area compose an electrophysiologic triad that allows the identification of the AFL critical isthmus. ![]()
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