High-density mapping of de novo focal atrial tachycardias using a new software: Protected low-voltage areas by zones of conduction delay.
J Arrhythm
; 36(4): 785-788, 2020 Aug.
Article
em En
| MEDLINE
| ID: mdl-32782657
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 cm2. 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.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article