Open AccessHigh‐density mapping of de novo focal atrial tachycardias using a new software: Protected low‐voltage areas by zones of conduction delay
Author(s) -
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
Publication year - 2020
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1002/joa3.12380
Subject(s) - medicine , cardiology , thermal conduction , composite material , materials science
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.