Characterization, Mapping, and Ablation of Complex Atrial Tachycardia: Initial Experience With a Novel Method of Ultra High-Density 3D Mapping.

摘要: Introduction Conventional mapping of complex atrial tachycardias (ATs) can be challenging. Thus, we evaluated feasibility and utility a novel, ultra high-density 3D approach to characterize map AT in these cases. Methods results Overall, 21 patients (67.4 ± 7.6 years; male: 52.4%, 1.9 1.4 previous ablation procedures) with documented referred our center underwent catheter including using novel 64-electrode mini-basket an adjunctive system. A total 24 (20 left atrial, 4 right AT) were analyzed 19 In 2 patients, acquisition failed due scarce local electrograms unstable cycle length, respectively. Underlying mechanisms focal (n = 3), as well 8) macro 13) reentry mean length 311.8 67.7 milliseconds. The analysis propagation waves, activation voltage revealed patterns allowed for the identification critical sites initiation or maintenance without need further techniques. all cases could verified by successful consecutive ablation. Mean time was 19.4 minutes, number points 19,217 10,270. Radiofrequency application until first effect 165.1 374.2 seconds; procedure 157.6 51.4 fluoroscopy 21.7 13.8 radiofrequency duration 1,016 951.9 seconds, No severe complications occurred. Conclusion Ultra is safe feasible. Further, it enables detailed insight into mechanisms. Critical identified precisely order guide