The Impact of Known Heart Disease on Long-Term Outcomes of Catheter Ablation in Patients with Atrial Fibrillation and Left Ventricular Systolic Dysfunction: A Multicenter International Study

Sandeep Prabhu, Liang Han Ling, Waqas Ullah, Ross J. Hunter, Richard J. Schilling, Alex J.A. McLellan, Mark J. Earley, Simon C. Sporton, Alex Voskoboinik, David Blusztein, Justin A. Mariani, Geoffrey Lee, Andrew J. Taylor, Jonathan M. Kalman, Peter M. Kistler

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The Impact of Known Heart Disease on AF Ablation Outcomes Background Catheter ablation for AF is an effective treatment for patients with AF and systolic LV dysfunction; however, the clinical outcome is variable. We evaluated the impact of cardiomyopathy etiology on long-term outcomes post-catheter ablation. Methods Patients undergoing AF ablation across 3 centers (2 Australian, 1 UK) from 2002 to 2014, with LVEF<45% were evaluated. Patients were stratified into those with known heart disease as a cause of cardiomyopathy (KHD), and those with idiopathic dilated cardiomyopathy (IDCM). Results One hundred and one patients (IDCM = 77, KHD = 24) with AF and LVEF <45% underwent AF ablation. The KHD group (ischemic HD in 67%) were older (61 ± 7 vs. 55 ± 11 years, P = 0.005), with a higher CHADS2 score (2.0 ± 0.8 vs. 1.6 ± 0.7, P = 0.016), but otherwise well matched. After mean follow-up of 36 ± 23 months, AF control was greater in the IDCM group (82% vs. 50% in KHD, P < 0.001). On multivariate analysis IDCM was associated with long-term AF control (P = 0.033). The IDCM group had less functional impairment at follow-up (NYHA class 1.5 ± 0.7 vs. 2.0 ± 0.8, P = 0.005) and improved LVEF (50 ± 11% vs. 38 ± 10%, P < 0.001). Super responders (EF improvement >15%) were overwhelmingly in the IDCM group (94% vs. 6%, P < 0.001) with greater AF control (89% vs. 61%, P < 0.001). All-cause mortality was significantly higher in the KHD group (17% vs. 1.3%, P = 0.002). Conclusion IDCM was associated with greater AF control, and improvement in symptoms and LVEF compared to patients with KHD post-AF ablation. AF is an important reversible cause of HF in patients with an unexplained CM and catheter ablation an effective treatment option.

Original languageEnglish
Pages (from-to)281-289
Number of pages9
JournalJournal of Cardiovascular Electrophysiology
Issue number3
Publication statusPublished - 1 Mar 2016
Externally publishedYes


  • atrial fibrillation
  • catheter ablation
  • coronary artery disease
  • idiopathic cardiomyopathy
  • known heart disease

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