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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Changes of electrophysiological parameters in patients with atrial flutter

1
Department of Cardiology
2
Institute of Cardiology, Kaunas University of Medicine, Lithuania
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Author to whom correspondence should be addressed.
Medicina 2007, 43(8), 614; https://doi.org/10.3390/medicina43080078
Received: 16 March 2007 / Accepted: 3 August 2007 / Published: 8 August 2007
Objectives. The aim of the study was to study some anatomic and electrophysiological features of the right atrium, related to the presence of atrial flutter.
Materials and methods
. A total 23 patients with type I atrial flutter and 22 patients without atrial flutter were studied. Right atrium size was assessed using echocardiography before intracardiac examination and radiofrequency ablation.
Results
. Effective refractory periods of coronary sinus, high right atrium, low right atrium were different comparing with the control group (P<0.05). A stimulus–response time between high right atrium and low right atrium positions in anterograde and retrograde ways, an impulse propagation speed along the lateral wall of the right atrium were statistically different comparing both groups (P<0.05). There was a significant correlation among effective refractory periods measured in different sites of the right atrium (r²=0.64, 0.44, 0.44, respectively). All measured effective refractory periods also correlated with stimulus–response time in anterograde way (P<0.05) and impulse propagation speed (P<0.05). Right atrium dimensions were significantly larger in atrial flutter group. There was no correlation between the right atrium dimensions and measured electrophysiological parameters in both groups.
Conclusions
. The presence of atrial flutter associates with diffuse alterations of the right atrium, but not the focal or single changes of refractoriness.
Keywords: atrial flutter; electrophysiological parameters; refractory period; impulse propagation speed atrial flutter; electrophysiological parameters; refractory period; impulse propagation speed
MDPI and ACS Style

Žaliaduonytė-Pekšienė, D.; Kazakevičius, T.; Zabiela, V.; Šileikis, V.; Vaičiulis, R.; Virketis, M.; Puodžiukynas, A. Changes of electrophysiological parameters in patients with atrial flutter. Medicina 2007, 43, 614.

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