High‐density mapping of de novo focal atrial tachycardias using a new software: Protected low‐voltage areas by zones of conduction delay. Issue 4 (14th June 2020)

• Record Type: Journal Article
• Authors: Letsas, Konstantinos P.; Efremidis, Michael; Bazoukis, George; Dragasis, Stylianos; Megarisiotou, Athanasia; Mililis, Panagiotis; Saplaouras, Athanasios; Vlachos, Konstantinos; Asvestas, Dimitrios; Valkanas, Kosmas; Tse, Gary; Sideris, Antonios
• Is Part Of: Journal of arrhythmia. Volume 36:Issue 4(2020)
• Page Start: 785
• Page End: 788
• Publication Date: 2020-06-14
• Subjects: ablation -- electroanatomical mapping -- focal atrial tachycardia; Arrhythmia -- Periodicals; Cardiac pacing -- Periodicals; Arrhythmias, Cardiac; Arrhythmia; Cardiac pacing; Periodicals; Electronic journals; Periodicals; 616.128
• DOI: 10.1002/joa3.12380
• Languages: English
• ISSNs: 1880-4276

Abstract

Abstract: Background: The pathophysiological mechanism of focal atrial tachycardias (AT) remains obscure. Methods: Fifteen patients (6 males, age 45 ± 18) with focal AT underwent high‐density activation mapping using a new software called extended early‐meets‐late (EEML). Results: Irrespective of the arrhythmia mechanism, low bipolar voltage fractionated signals (0.14 ± 0.10 mV) were seen at the earliest activation site. The mean low‐voltage area (LVA) at the earliest activation site was 3.2 ± 1.0 cm 2 . EEML mapping revealed zones of conduction delay at the borders of LVAs. Conclusions: LVAs protected by zones of slow conduction appears to play an important role in the initiation and maintenance of focal ATs. Abstract : Low‐voltage areas protected by zones of slow conduction appear to play an important role in the pathophysiology of focal ATs.