Electrophysiologic characteristics of the sinus venosa in patients with typical atrial flutter

Pacing and Clinical Electrophysiology : PACE
Ching-Tai TaiShih-Ann Chen

Abstract

The sinus venosa is a posterior barrier of typical atrial flutter. However, its electrophysiology has not been studied. The study population included 20 patients with typical atrial flutter (Group 1) and 20 patients with paroxysmal supraventricular tachycardia (Group 2). The noncontact mapping system was used to evaluate the electrophysiology of the sinus venosa (SV) during coronary sinus (CS) and low right atrial (LRA) pacing and atrial activation during typical atrial flutter. The results showed 12 of Group 1 patients (60%) had two lines of block, one in the CT and the other in the SV. The virtual electrograms in the CT and SV showed double potentials. Eight patients (40%) had only one line of block in the CT. During atrial pacing at the cycle length of 500 ms, nine of Group 1 patients had a line of block on the SV. None of the Group 2 patients had a line of block. During atrial pacing at the CL of 300 ms, 12 of Group 1 patients had a line of block on the SV. Eight of Group 1 patients had transverse conduction through the SV during atrial pacing. None of the Group 2 had a line of block. This study showed that the SV formed the posterior line of block in 60% of the patients with typical atrial flutter. Fixed conduction block a...Continue Reading

Citations

Apr 21, 2011·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Mitsuru TakamiKen-Ichi Hirata
Feb 28, 2009·Circulation Journal : Official Journal of the Japanese Circulation Society·Masahide HaradaItsuo Kodama
Sep 25, 2008·Pacing and Clinical Electrophysiology : PACE·Ching-Tai Tai, Shin-Ann Chen
Jul 4, 2009·Pacing and Clinical Electrophysiology : PACE·Norishige MoritaKyoichi Mizuno
Jul 20, 2019·American Journal of Physiology. Heart and Circulatory Physiology·Siamak SalavatianMarmar Vaseghi
Oct 6, 2012·Pacing and Clinical Electrophysiology : PACE·Masateru KondoHiroaki Shimokawa

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