Acute and long-term effects of atrioventricular junction ablation and VVIR pacemaker in symptomatic patients with chronic lone atrial fibrillation and normal ventricular response

Kwo Chang Ueng, Tsung Po Tsai, Chin Feng Tsai, Der Jinn Wu, Chung Sheng Lin, Shih Huang Lee, Shih Ann Chen

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Introduction: The precise role of irregular ventricular response in atrial fibrillation (AF) has not been fully elucidated. This study examined the independent effects of rhythm regularity in patients with chronic AF. Methods and Results: This study included 50 patients who had chronic lone AF and a normal ventricular rate. Among these patients, 21 who underwent AV junction ablation and implantation of a VVIR pacemaker constituted the ablation group; the other 29 patients were the medical group. Acute hemodynamic findings were measured in 21 ablation patients before ablation (during AF, baseline) and 15 minutes after ablation (during right ventricular pacing). Compared with baseline data, ablation and pacing therapy increased cardiac output (4.7 ± 0.8 vs 5.2 ± 0.9 L/min; P = 0.05), decreased pulmonary capillary wedge pressure (16 ± 5 vs 13 ± 4 mmHg; P = 0.001), and decreased left ventricular end-diastolic pressure (14 ± 4 vs 11 ± 3 mmHg; P < 0.05). After 12 months, the ablation group patients showed lower scores in general quality of life (-20%; P < 0.001), overall symptoms (-24%; P < 0.001), overall activity scale (-23%; P = 0.004), and significant increase of left ventricular ejection fraction (44% ± 6% vs 49% ± 5%; P = 0.02) by echocardiographic examination. Conclusion: AV junction ablation and pacing in patients with chronic AF and normal ventricular response may confer acute and long-term benefits beyond rate control by eliminating rhythm irregularity.

Original languageEnglish
Pages (from-to)303-309
Number of pages7
JournalJournal of Cardiovascular Electrophysiology
Volume12
Issue number3
DOIs
Publication statusPublished - 2001
Externally publishedYes

Keywords

  • Atrial fibrillation
  • Atrioventricular junction
  • Catheter ablation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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