Related Experiment Video
Updated: Nov 16, 2025
28:13
Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
33.7K
Atrial Fibrillation Burden and Clinical Outcomes in Heart Failure: The CASTLE-AF Trial
Johannes Brachmann1, Christian Sohns2, Dietrich Andresen3
1Department of Cardiology Klinikum Coburg, Coburg, Germany.
JACC. Clinical Electrophysiology
|February 28, 2021
Summary
Atrial fibrillation burden after catheter ablation predicts outcomes in heart failure patients. Maintaining AF burden below 50% significantly reduces mortality and adverse events.
Area of Science:
- Cardiology
- Electrophysiology
- Heart Failure Management
Background:
- The CASTLE-AF trial showed catheter ablation benefits patients with heart failure and reduced ejection fraction (HFrEF).
- The impact of atrial fibrillation (AF) recurrence and burden post-ablation on long-term outcomes in these patients remains unclear.
Purpose of the Study:
- To investigate the association between AF recurrence, AF burden, and clinical outcomes in heart failure patients post-ablation.
- To determine if AF burden after catheter ablation influences the treatment benefits observed in the CASTLE-AF trial.
Main Methods:
- Subanalysis of 280 patients from the CASTLE-AF trial (128 ablation, 152 pharmacological therapy).
- Patients had implanted defibrillators with home monitoring for AF burden assessment (percentage of arrhythmia time per day).
- AF recurrence defined as any episode >30 seconds.
Main Results:
- AF burden at baseline did not predict primary endpoint or mortality.
- AF recurrence (>30s) showed no relationship with mortality or HF hospitalization.
- An AF burden <50% at 6 months post-ablation was linked to significantly lower composite outcomes (HR: 0.33) and mortality (HR: 0.23).
Conclusions:
- AF burden at 6 months post-ablation is a significant predictor of clinical outcomes in heart failure patients.
- Recurrent atrial tachyarrhythmia episodes >30 seconds after ablation did not correlate with improved mortality or HF hospitalization.
- Maintaining a low AF burden (<50%) after catheter ablation is crucial for improving hard clinical outcomes in heart failure patients.
More Related Videos
Related Concept Videos
01:26Heart Failure III: Clinical Manifestations
146
Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
146
01:29Heart Failure II: Pathophysiology
200
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
200
01:30Heart Failure IV: Classification and Diagnostic Evaluation
128
Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
128
01:17Pathophysiology of Heart Failure
2.2K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
2.2K
01:30Heart Failure V: Medical Management
85
Medical Management of Acute Decompensated Heart Failure (ADHF)The primary goals of therapy for patients hospitalized with acute decompensated heart failure (ADHF) include:Relieving symptomsOptimizing volume statusSupporting oxygenation and ventilationMaintaining cardiac output (CO) and end-organ perfusionIdentifying and addressing the cause of ADHFPreventing complicationsProviding patient education on factors precipitating HF exacerbationPlanning for dischargeOngoing monitoring and assessment...
85
01:22Heart Failure VI: Adjunct Therapies
101
Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
101