European Heart Journal Advance Access published online on December 20, 2004
European Heart Journal, doi:10.1093/eurheartj/ehi069
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1 Department of Cardiology, Ospedali del Tigullio, Via don Bobbio, 16033 Lavagna, Italy
* To whom correspondence should be addressed. Aims Left ventricular (LV) and biventricular (BiV) pacing are potentially superior to right ventricular (RV) apical pacing in patients undergoing atrioventricular (AV) junction ablation and pacing for permanent atrial fibrillation. Methods and results Prospective randomized, single-blind, 3-month crossover comparison between RV and LV pacing (phase 1) and between RV and BiV pacing (phase 2) performed in 56 patients (70 ± 8 years, 34 males) affected by severely symptomatic permanent atrial fibrillation, uncontrolled ventricular rate, or heart failure. Primary endpoints were quality of life and exercise capacity. Compared with RV pacing, the Minnesota Living with Heart Failure Questionnaire (LHFQ) score improved by 2 and 10% with LV and BiV pacing, respectively, the effort dyspnoea item of the Specific Symptom Scale (SSS) changed by 0 and 2%, the Karolinska score by 6 and 14% (P < 0.05 for BiV), the New York Heart Association (NYHA) class by 5 and 11% (P < 0.05 for BiV), the 6-min walked distance by 12 (+4%) and 4m (+1%), and the ejection fraction by 5 and 5% (P < 0.05 for both). BiV pacing but not LV pacing was slightly better than RV pacing in the subgroup of patients with preserved systolic function and absence of native left bundle branch block. Compared with pre-ablation measures, the Minnesota LHFQ score improved by 37, 39, and 49% during RV, LV, and BiV pacing, respectively, the effort dyspnoea item of the SSS by 25, 25, and 39%, the Karolinska score by 39, 42, and 54%, the NYHA class by 21, 25, and 30%, the 6-min walking distance by 35 (12%), 47 (16%), and 51m (19%) and the ejection fraction by 5, 10, and 10% (all differences P < 0.05). Conclusions Rhythm regularization achieved with AV-junction ablation improved quality of life and exercise capacity with all modes of pacing. LV and BiV pacing provided modest or no additional favourable effect compared with RV pacing.
Clinical research
Comparative assessment of right, left, and biventricular pacing in patients with permanent atrial fibrillation
2 Department of Cardiology, University Hospital and University of Birmingham, Birmingham, UK
3 Department of Cardiology, Ospedale Civile, Cento, Italy
4 Department of Cardiology, Ospedale Umberto I, Mestre, Italy
5 Department of Cardiology, Royal Brompton Hospital, London, UK
6 Department of Cardiology, University Hospital, Heraklion, Greece
7 Department of Cardiology, Ospedale Cisanello, Pisa, Italy
8 Department of Cardiology, Karolinska University Hospital, Solna, Stockholm, Sweden
9 Department of Cardiology, Ospedale S Maria Nuova, Reggio Emilia, Italy
10 Department of Cardiology, Ospedale Civile, Imperia, Italy
M. Brignole, E-mail: mbrignole{at}asl4.liguria.it
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