Atrial Ectopy Increases Asynchronous Activation of the Endo- and Epicardium at the Right Atrium.

ABSTRACT: The predisposition of atrial extrasystoles (AES) to trigger cardiac tachyarrhythmia may arise from intramural conduction disorders causing endo-epicardial asynchrony (EEA). This study aimed to determine whether spontaneous AES disturb endo-epicardial conduction. Simultaneous endo-epicardial mapping of the right atrium was performed in patients during cardiac surgery with two 128-electrode arrays. Sixty spontaneous AES were observed in 23 patients and were analyzed for incidence of conduction delay, conduction block and amount of EEA compared to the previous sinus rhythm beat. Both conduction delay and block occurred more often in AES compared to sinus rhythm. The difference in lines of conduction block between the epicardium and endocardium increased in AES causing a greater imbalance of c

SUBMITTER: van der Does LJME 

PROVIDER: S-EPMC7074567 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature