Ablation Versus Amiodarone for Treatment of Persistent Atrial Fibrillation in Patients With Congestive Heart Failure and an Implanted Device: Results From the AATAC Multicenter Randomized Trial

Luigi Di Biase, Prasant Mohanty, Sanghamitra Mohanty, Pasquale Santangeli, Chintan Trivedi, Dhanunjaya Lakkireddy, Madhu Reddy, Pierre Jais, Sakis Themistoclakis, Antonio Dello Russo, Michela Casella, Gemma Pelargonio, Maria Lucia Narducci, Robert Schweikert, Petr Neuzil, Javier Sanchez, Rodney Horton, Salwa Beheiry, Richard Hongo, Steven HaoAntonio Rossillo, Giovanni Forleo, Claudio Tondo, J. David Burkhardt, Michel Haissaguerre, Andrea Natale

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229 Scopus citations

Abstract

Background - Whether catheter ablation (CA) is superior to amiodarone (AMIO) for the treatment of persistent atrial fibrillation (AF) in patients with heart failure is unknown. Methods and Results - This was an open-label, randomized, parallel-group, multicenter study. Patients with persistent AF, dual-chamber implantable cardioverter defibrillator or cardiac resynchronization therapy defibrillator, New York Heart Association II to III, and left ventricular ejection fraction <40% within the past 6 months were randomly assigned (1:1 ratio) to undergo CA for AF (group 1, n=102) or receive AMIO (group 2, n=101). Recurrence of AF was the primary end point. All-cause mortality and unplanned hospitalization were the secondary end points. Patients were followed up for a minimum of 24 months. At the end of follow-up, 71 (70%; 95% confidence interval, 60%-78%) patients in group 1 were recurrence free after an average of 1.4±0.6 procedures in comparison with 34 (34%; 95% confidence interval, 25%-44%) in group 2 (log-rank P<0.001). The success rate of CA in the different centers after a single procedure ranged from 29% to 61%. After adjusting for covariates in the multivariable model, AMIO therapy was found to be significantly more likely to fail (hazard ratio, 2.5; 95% confidence interval, 1.5-4.3; P<0.001) than CA. Over the 2-year follow-up, the unplanned hospitalization rate was (32 [31%] in group 1 and 58 [57%] in group 2; P<0.001), showing 45% relative risk reduction (relative risk, 0.55; 95% confidence interval, 0.39-0.76). A significantly lower mortality was observed in CA (8 [8%] versus AMIO (18 [18%]; P=0.037). Conclusions - This multicenter randomized study shows that CA of AF is superior to AMIO in achieving freedom from AF at long-term follow-up and reducing unplanned hospitalization and mortality in patients with heart failure and persistent AF.

Original languageEnglish (US)
Pages (from-to)1637-1644
Number of pages8
JournalCirculation
Volume133
Issue number17
DOIs
StatePublished - Apr 26 2016

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Keywords

  • amiodarone
  • atrial fibrillation
  • catheter ablation
  • heart failure

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

Cite this

Di Biase, L., Mohanty, P., Mohanty, S., Santangeli, P., Trivedi, C., Lakkireddy, D., Reddy, M., Jais, P., Themistoclakis, S., Dello Russo, A., Casella, M., Pelargonio, G., Narducci, M. L., Schweikert, R., Neuzil, P., Sanchez, J., Horton, R., Beheiry, S., Hongo, R., ... Natale, A. (2016). Ablation Versus Amiodarone for Treatment of Persistent Atrial Fibrillation in Patients With Congestive Heart Failure and an Implanted Device: Results From the AATAC Multicenter Randomized Trial. Circulation, 133(17), 1637-1644. https://doi.org/10.1161/CIRCULATIONAHA.115.019406