PMID: 15224642Jul 1, 2004Paper

Atrial flutter ablation: correlation between isthmic activation times and flutter cycle

Revista Portuguesa De Cardiologia : Orgão Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
Katya Reis-SantosRicardo Seabra-Gomes

Abstract

Ablation of typical atrial flutter relies on the suppression of electrical conduction along the cavo-tricuspid isthmus. Bidirectional isthmus block is a criterion of successful ablation and is associated with the presence of different activation times on each side of the ablation line. The aim of this study was to determine whether the difference in isthmic activation times correlates with the length of the atrial flutter cycle. We studied 31 patients with typical atrial flutter (93.6% male, mean age 66 +/- 9 years) who underwent successful ablation during tachycardia. CARTO electroanatomic mapping was used to confirm diagnosis of isthmus-dependent atrial flutter, guide the ablation line creation and assess its efficacy. At the end of the procedure, a three-dimensional activation map of the right atrium was constructed, under pacing from the coronary sinus ostium (with a 500 ms cycle). Activation times on the lateral (right) and septal (left) sides of the ablation line were measured. The difference between these two activation times was termed the difference in isthmic activation times (delta IAT), and was compared to the flutter cycle length. Mean activation times were 173.7 +/- 34.3 ms on the lateral border of the ablation li...Continue Reading

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.

Related Papers

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
Seiichiro MatsuoMichihiro Yoshimura
Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing
Ching-Tai TaiShih-Ann Chen
© 2022 Meta ULC. All rights reserved