Outcomes after atrioventricular node ablation and biventricular pacing in patients with refractory atrial fibrillation and heart failure: A comparison between non-ischaemic and ischaemic cardiomyopathy

Daniel Sohinki, Jeffrey Ho, Nishant Srinivasan, Laura J. Collins, Owen A. Obel

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Aims: Atrioventricular junction ablation (AVJA) combined with biventricular (BiV) pacing (AVJA/BiV) is an effective treatment for refractory atrial fibrillation (AF) and rapid ventricular response (RVR) associated with heart failure (HF). This study compared the outcomes between patients with non-ischaemic (DCM) and ischaemic cardiomyopathy (ICM) following AVJA/BiV for AF/RVR. Methods and results: This was a retrospective study of 45 patients, comparing the response to AVJA/BiV in patients with ICM to those with DCM. The study compared (a) the change in echocardiographic parameters of HF (ejection fraction (EF) and left ventricular dimensions) prior to, and at least 6 months post AVJA/BiV; and (b) HF hospitalizations (HFH) and appropriate implantable cardioverter defibrillator (ICD) therapies occurring post-procedure. Ejection fraction improved significantly in the DCM group (ΔEF 11.2 ± 11.9; P< 0.01); however, EF remained unchanged (ΔEF 0.5 ± 9.9; P NS) in the ICM group post-AVJA/BiV. Post-procedurely, HFH were significantly more common (15/18 vs. 4/25; P < 0.0001), and there were significantly more appropriate ICD therapies (9.4 ± 12.3 vs. 2.3 ± 6.1; P 0.01) in the ICM compared with the DCM group. Conclusion: After AVJA/BiV, there was significantly less post-procedural echocardiographic reverse remodelling, and more HFH in the ICM compared with the DCM group. In addition, significantly more appropriate ICD therapies occurred in ICM patients post-procedure. These differences may be due to the presence of more extensive discrete myocardial scar in patients with ICM. Furthermore, it is possible that tachycardia-induced cardiomyopathy plays more of a causative role in HF in patients with AF and DCM than those with ICM.

Original languageEnglish (US)
Pages (from-to)880-886
Number of pages7
JournalEuropace
Volume16
Issue number6
DOIs
StatePublished - 2014

Fingerprint

Atrioventricular Node
Cardiac Resynchronization Therapy
Cardiomyopathies
Atrial Fibrillation
Heart Failure
Implantable Defibrillators
Hospitalization
Therapeutics
Tachycardia
Stroke Volume
Cicatrix
Retrospective Studies
Outcome Assessment (Health Care)

Keywords

  • Atrial fibrillation
  • AV node ablation
  • Biventricular pacing
  • Ischaemic cardiomyopathy
  • Non-ischaemic cardiomyopathy

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)
  • Medicine(all)

Cite this

Outcomes after atrioventricular node ablation and biventricular pacing in patients with refractory atrial fibrillation and heart failure : A comparison between non-ischaemic and ischaemic cardiomyopathy. / Sohinki, Daniel; Ho, Jeffrey; Srinivasan, Nishant; Collins, Laura J.; Obel, Owen A.

In: Europace, Vol. 16, No. 6, 2014, p. 880-886.

Research output: Contribution to journalArticle

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abstract = "Aims: Atrioventricular junction ablation (AVJA) combined with biventricular (BiV) pacing (AVJA/BiV) is an effective treatment for refractory atrial fibrillation (AF) and rapid ventricular response (RVR) associated with heart failure (HF). This study compared the outcomes between patients with non-ischaemic (DCM) and ischaemic cardiomyopathy (ICM) following AVJA/BiV for AF/RVR. Methods and results: This was a retrospective study of 45 patients, comparing the response to AVJA/BiV in patients with ICM to those with DCM. The study compared (a) the change in echocardiographic parameters of HF (ejection fraction (EF) and left ventricular dimensions) prior to, and at least 6 months post AVJA/BiV; and (b) HF hospitalizations (HFH) and appropriate implantable cardioverter defibrillator (ICD) therapies occurring post-procedure. Ejection fraction improved significantly in the DCM group (ΔEF 11.2 ± 11.9; P< 0.01); however, EF remained unchanged (ΔEF 0.5 ± 9.9; P NS) in the ICM group post-AVJA/BiV. Post-procedurely, HFH were significantly more common (15/18 vs. 4/25; P < 0.0001), and there were significantly more appropriate ICD therapies (9.4 ± 12.3 vs. 2.3 ± 6.1; P 0.01) in the ICM compared with the DCM group. Conclusion: After AVJA/BiV, there was significantly less post-procedural echocardiographic reverse remodelling, and more HFH in the ICM compared with the DCM group. In addition, significantly more appropriate ICD therapies occurred in ICM patients post-procedure. These differences may be due to the presence of more extensive discrete myocardial scar in patients with ICM. Furthermore, it is possible that tachycardia-induced cardiomyopathy plays more of a causative role in HF in patients with AF and DCM than those with ICM.",
keywords = "Atrial fibrillation, AV node ablation, Biventricular pacing, Ischaemic cardiomyopathy, Non-ischaemic cardiomyopathy",
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T1 - Outcomes after atrioventricular node ablation and biventricular pacing in patients with refractory atrial fibrillation and heart failure

T2 - A comparison between non-ischaemic and ischaemic cardiomyopathy

AU - Sohinki, Daniel

AU - Ho, Jeffrey

AU - Srinivasan, Nishant

AU - Collins, Laura J.

AU - Obel, Owen A.

PY - 2014

Y1 - 2014

N2 - Aims: Atrioventricular junction ablation (AVJA) combined with biventricular (BiV) pacing (AVJA/BiV) is an effective treatment for refractory atrial fibrillation (AF) and rapid ventricular response (RVR) associated with heart failure (HF). This study compared the outcomes between patients with non-ischaemic (DCM) and ischaemic cardiomyopathy (ICM) following AVJA/BiV for AF/RVR. Methods and results: This was a retrospective study of 45 patients, comparing the response to AVJA/BiV in patients with ICM to those with DCM. The study compared (a) the change in echocardiographic parameters of HF (ejection fraction (EF) and left ventricular dimensions) prior to, and at least 6 months post AVJA/BiV; and (b) HF hospitalizations (HFH) and appropriate implantable cardioverter defibrillator (ICD) therapies occurring post-procedure. Ejection fraction improved significantly in the DCM group (ΔEF 11.2 ± 11.9; P< 0.01); however, EF remained unchanged (ΔEF 0.5 ± 9.9; P NS) in the ICM group post-AVJA/BiV. Post-procedurely, HFH were significantly more common (15/18 vs. 4/25; P < 0.0001), and there were significantly more appropriate ICD therapies (9.4 ± 12.3 vs. 2.3 ± 6.1; P 0.01) in the ICM compared with the DCM group. Conclusion: After AVJA/BiV, there was significantly less post-procedural echocardiographic reverse remodelling, and more HFH in the ICM compared with the DCM group. In addition, significantly more appropriate ICD therapies occurred in ICM patients post-procedure. These differences may be due to the presence of more extensive discrete myocardial scar in patients with ICM. Furthermore, it is possible that tachycardia-induced cardiomyopathy plays more of a causative role in HF in patients with AF and DCM than those with ICM.

AB - Aims: Atrioventricular junction ablation (AVJA) combined with biventricular (BiV) pacing (AVJA/BiV) is an effective treatment for refractory atrial fibrillation (AF) and rapid ventricular response (RVR) associated with heart failure (HF). This study compared the outcomes between patients with non-ischaemic (DCM) and ischaemic cardiomyopathy (ICM) following AVJA/BiV for AF/RVR. Methods and results: This was a retrospective study of 45 patients, comparing the response to AVJA/BiV in patients with ICM to those with DCM. The study compared (a) the change in echocardiographic parameters of HF (ejection fraction (EF) and left ventricular dimensions) prior to, and at least 6 months post AVJA/BiV; and (b) HF hospitalizations (HFH) and appropriate implantable cardioverter defibrillator (ICD) therapies occurring post-procedure. Ejection fraction improved significantly in the DCM group (ΔEF 11.2 ± 11.9; P< 0.01); however, EF remained unchanged (ΔEF 0.5 ± 9.9; P NS) in the ICM group post-AVJA/BiV. Post-procedurely, HFH were significantly more common (15/18 vs. 4/25; P < 0.0001), and there were significantly more appropriate ICD therapies (9.4 ± 12.3 vs. 2.3 ± 6.1; P 0.01) in the ICM compared with the DCM group. Conclusion: After AVJA/BiV, there was significantly less post-procedural echocardiographic reverse remodelling, and more HFH in the ICM compared with the DCM group. In addition, significantly more appropriate ICD therapies occurred in ICM patients post-procedure. These differences may be due to the presence of more extensive discrete myocardial scar in patients with ICM. Furthermore, it is possible that tachycardia-induced cardiomyopathy plays more of a causative role in HF in patients with AF and DCM than those with ICM.

KW - Atrial fibrillation

KW - AV node ablation

KW - Biventricular pacing

KW - Ischaemic cardiomyopathy

KW - Non-ischaemic cardiomyopathy

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