Cardiac resynchronization therapy response is associated with shorter duration of atrial fibrillation


Por: Lellouche, N, De Diego, C, Vaseghi, M, Buch, E, Cesario, D, Mahajan, A, Wiener, I, Fonarow, G, Boyle, N and Shivkumar, K

Publicada: 1 nov 2007
Resumen:
Background: Atrial fibrillation (AF) is commonly associated with heart failure. The benefit of cardiac resynchronization therapy (CRT) on atrial remodeling has been demonstrated. However, biventricular pacing did not reduce the global incidence of AF. We evaluated the relationship between CRT response and AF duration. Methods: We retrospectively analyzed data from 96 patients (59 +/- 15 years; 78% male) who underwent CRT. All patients had class III-IV New York Heart Association (NYHA) symptoms despite maximal medical therapy, left ventricular ejection fraction (LVEF) <= 35%, QRS > 130 ms, and sinus rhythm before implantation. CRT response in patients who survived at six months of follow-up was defined as: (1) no hospitalization for heart failure and (2) improvement of one or more grades in the NYHA classification. Results: CRT responders (n = 54) and non-responders (n = 42) had similar baseline characteristics, including the incidence of persistent AF within six months before implantation. Six months after implantation, when compared to baseline, CRT responders exhibited a significant decrease in left atrial size (47.5 +/- 7.1 mm vs 44.6 +/- 7.7 mm, P < 0.01) and in the incidence of persistent AF (17% vs 2%, P = 0.02). At six months, CRT responders demonstrated shorter mean AF duration (7.5 +/- 43.3 hours vs 48.8 +/- 129.0 hours, P = 0.03) and lower incidence of persistent AF (2% vs 19%, P = 0.004) compared to nonresponders. Conclusion: CRT response is associated with a reversal of atrial remodeling and a shorter AF duration.

Filiaciones:
Univ Calif Los Angeles, Cardiac Arrhythmia Ctr, David Geffen Sch Med, Dept Med,Div Cardiol, Los Angeles, CA 90095 USA.
ISSN: 01478389





PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY
Editorial
WILEY-BLACKWELL, United States, Estados Unidos America
Tipo de documento: Article
Volumen: 30 Número: 11
Páginas: 1363-1368
WOS Id: 000250553400012
ID de PubMed: 17976100

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