PMID: 9436771Jan 22, 1998Paper

Conduction velocity in the tricuspid valve-inferior vena cava isthmus is slower in patients with type I atrial flutter compared to those without a history of atrial flutter

Journal of Cardiovascular Electrophysiology
G K FeldM Rahme

Abstract

In human type I atrial flutter, the electrophysiologic substrate is unclear. In order to determine if slow conduction is mechanistically important, we evaluated conduction velocity in the tricuspid valve-inferior vena cava (TV-IVC) isthmus, right atrial free wall, and interatrial septum in patients with and without a history of atrial flutter undergoing electrophysiologic study. Nine patients with (group 1) and nine without a history of type 1 atrial flutter (group 2) were studied. Conduction time (msec) in the right atrial free wall, TV-IVC isthmus (bidirectional), and interatrial septum was measured during pacing in sinus rhythm at cycle lengths of 600, 500, 400, and 300 msec from the low lateral right atrium and coronary sinus ostium. Conduction velocity (cm/sec) was calculated by dividing the distance between pacing electrodes and sensing electrodes (cm) by the conduction time (sec). Conduction velocity was slower in the TV-IVC isthmus in group 1 (range 37 +/- 8 to 42 +/- 8 cm/sec) versus group 2 (range 50 +/- 8 to 55 +/- 9 msec) at all pacing cycle lengths (P < 0.05). However, conduction velocity was not different in the right atrial free wall or interatrial septum between groups 1 and 2. Conduction velocity was also slowe...Continue Reading

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Citations

Jun 22, 2012·Medical & Biological Engineering & Computing·Olaf DösselGunnar Seemann
Jul 19, 2013·Medical & Biological Engineering & Computing·Martin W KruegerOlaf Dössel
Mar 1, 2002·Journal of the American College of Cardiology·Pietro TurcoBilal El Jamal
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Oct 12, 2000·Pacing and Clinical Electrophysiology : PACE·B ZrennerC Schmitt
Oct 12, 1999·Journal of Cardiovascular Electrophysiology·G K Feld
May 24, 2014·PLoS Computational Biology·Jussi T KoivumäkiPasi Tavi
Mar 3, 2009·Journal of the Chinese Medical Association : JCMA·Ching-Tai Tai, Shih-Ann Chen
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Dec 20, 2019·Pacing and Clinical Electrophysiology : PACE·Sok-Sithikun BunEmile Ferrari
May 16, 2018·JACC. Clinical Electrophysiology·Decebal Gabriel Laţcu, Nadir Saoudi

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