Key result
Adding SVC ablation to cryoballoon PVI fails to improve atrial tachyarrhythmia freedom at 12 months.
Why the study?
The superior vena cava has been considered a specific trigger in atrial fibrillation development, but the efficacy and safety of combining SVC ablation with cryoballoon PVI remained to be evaluated.
Does combining cryoballoon pulmonary vein isolation with superior vena cava ablation improve freedom from atrial tachyarrhythmia in patients with paroxysmal or non-long-standing persistent atrial fibrillation?
RCT (n=100)
randomly assigned
Does combining cryoballoon pulmonary vein isolation with superior vena cava ablation improve freedom from atrial tachyarrhythmia in patients with paroxysmal or non-long-standing persistent atrial fibrillation?
p-value: p==0.91
Routine inclusion of superior vena cava ablation during first-time cryoballoon pulmonary vein isolation for atrial fibrillation does not improve arrhythmia-free survival and increases complications.
Routine SVC ablation should not be added to cryoballoon PVI; challenges adjunctive non-PV trigger ablation in paroxysmal AF.
BACKGROUND: Superior vena cava (SVC) has been considered a specific trigger in atrial fibrillation development. METHODS: We investigated the efficacy and safety of combining cryoballoon pulmonary vein isolation (PVI) with SVC ablation compared with PVI alone in 100 patients with paroxysmal or non-long-standing persistent atrial fibrillation. Patients were randomly assigned to either the PVI+SVC ablation group or the PVI-only group. Each patient was given a mobile device to record a daily ECG and detect atrial tachyarrhythmias. CONCLUSIONS: The addition of SVC ablation to PVI did not enhance freedom from atrial tachyarrhythmia at 12 months, and it led to increased complications. These findings do not support the routine inclusion of SVC ablation in cryoballoon procedures for first-time catheter ablation in patients with paroxysmal or non-long-standing persistent atrial fibrillation.
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Castro‐Urda et al. (2024) conducted an RCT in paroxysmal or non-long-standing persistent atrial fibrillation (n=100). Cryoballoon pulmonary vein isolation (PVI) with SVC ablation vs. PVI alone was evaluated on Freedom from atrial tachyarrhythmia (p==0.91). Combining cryoballoon pulmonary vein isolation with superior vena cava ablation did not enhance freedom from atrial tachyarrhythmia at 12 months compared to PVI alone (P=0.91).
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