New technique for simultaneous catheter mapping of pulmonary veins for catheter ablation in focal atrial fibrillation

Cardiology
Koichiro KumagaiKeijiro Saku

Abstract

Most focal atrial fibrillation (AF) can be triggered by premature beats from pulmonary veins (PVs), and ablation of these foci could cure AF. However, it is difficult to locate the trigger points of PVs using only one mapping catheter. The purpose of the present study was to investigate the efficacy of using four mapping catheters in four PVs simultaneously in the ablation of focal AF. Thirty-two patients with frequent attacks of paroxysmal AF triggered by PV foci were included. After a transseptal procedure, three 2-french microcatheters and one 7-french catheter for ablation were placed into each of the PVs, and mapping of the four PVs was performed simultaneously. Fifty-eight foci were identified; 51 triggers (88%) originated from the PV and 7 (12%) from atrial tissue. The trigger points of AF were found in a single focus in 14 patients, in 2 foci in 12 patients, and in 3-4 foci in 6 patients. During a mean follow-up period of 10 +/- 4 months, ablation eliminated AF without drugs in 86, 50 and 33% of the patients with 1, 2 and 3-4 targeted PVs, respectively; 20 patients (63%) were successfully ablated. Age, history of AF, the dimension of the left atrium and the number of focal origins were significant predictors of success....Continue Reading

Citations

Mar 6, 2007·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Ming-Hsiung Hsieh, Shih-Ann Chen
Mar 19, 2004·Journal of Cardiovascular Electrophysiology·Dagmara Dilling-BoerHein Heidbuchel

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