Non-invasive evaluation of the effect of metoprolol on the atrioventricular node during permanent atrial fibrillation

Valentina D.A. Corino, Frida Sandberg, Luca T. Mainardi, Sara R. Ulimoen, Steve Enger, Arnljot Tveit, Pyotr G. Platonov, Leif Sornmo

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review


The aim of this study was to evaluate changes in AV nodal properties during administration of metoprolol, using a novel ECG-based method for parameter estimation. The AV nodal parameters account for the probability of an impulse not passing through the fast pathway, the absolute refractory periods of the slow and fast pathways (aRPs and aRPf), representing the functional refractory period, and related prolongation in the respective refractory periods. Twenty patients (age 71±8 years, 14 men) with permanent AF from the RATe control in Atrial Fibrillation (RATAF) database were included in this study. Recordings during baseline and metoprolol administration were analyzed. Furthermore, simulated RR series were generated mimicking metoprolol administration. During metoprolol administration, aRP was significantly prolonged in both pathways (aRPs: 342±39 vs. 408±81 ms, p<0.001; aRPf: 432±74 vs. 527±83 ms, p<0.001). Similar results were found for the simulated RR series: both aRPs and aRPf were significantly prolonged with metoprolol. The AV nodal parameters reflect expected changes after metoprolol administration, i.e., a prolongation in functional refractory period. The simulations suggest that aRP may serve as an estimate of the functional refractory period.

Titel på värdpublikationComputing in Cardiology 2014
Antal sidor4
ISBN (elektroniskt)978-1-4799-4347-0
StatusPublished - 2014 jan. 1
Evenemang41st Computing in Cardiology Conference, CinC 2014 - Cambridge, USA
Varaktighet: 2014 sep. 72014 sep. 10


NamnComputing in Cardiology
FörlagIEEE Computer Society
ISSN (tryckt)2325-8861


Konferens41st Computing in Cardiology Conference, CinC 2014


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