Key result
Cryoballoon ablation with continuous ILR monitoring significantly reduced median AF burden from 7% pre-ablation to 0.2% post-ablation (p=0.017).
Why the study?
Long-term AF recurrence remains a challenge after cryoballoon ablation, and whether continuous ILR monitoring enhanced by artificial intelligence can optimize patient management required assessment.
Does continuous monitoring with implantable loop recorders enhanced by AI improve detection of AF recurrence and guide therapeutic management in patients undergoing cryoballoon ablation?
Cohort (n=91)
Yes
Does continuous monitoring with implantable loop recorders enhanced by AI improve detection of AF recurrence and guide therapeutic management in patients undergoing cryoballoon ablation?
Absolute Event Rate: 0.2% vs 7%
p-value: p=0.017
Continuous ILR monitoring with AI integration effectively detects AF recurrence and burden post-cryoballoon ablation, facilitating targeted therapeutic adjustments and reducing clinician workload.
ILR-AI monitoring was associated with lower post-ablation AF burden and fewer false alerts; hypothesis-generating for guiding therapy, needs RCTs.
Objectives: Atrial fibrillation (AF) is the most common sustained arrhythmia associated with stroke, heart failure, and increased mortality. Due to its efficacy and safety, cryoballoon ablation (CBA) is widely accepted for rhythm control; however, long-term AF recurrence remains a challenge. Continuous monitoring with implantable loop recorders (ILRs) enhanced by artificial intelligence (AI) can detect both symptomatic and asymptomatic episodes, potentially optimizing patient management. This analysis assessed the long-term effectiveness of CBA in maintaining sinus rhythm and investigated the role of ILR-guided monitoring in enhancing therapeutic decisions. Methods: Data from 91 patients with paroxysmal or persistent atrial fibrillation (AF) who underwent pulmonary vein isolation using cryoballoon ablation at four Italian centers between April 2022 and April 2024 were analyzed. All patients received an insertable loop recorder (ILR) before or during hospitalization for ablation, allowing for the continuous remote monitoring of arrhythmias. Baseline demographics, procedural details, AF occurrence, AF burden (calculated as the total duration of all AF episodes occurring within a day and categorized by episode duration), therapeutic adjustments, and the effect of artificial intelligence (AI) on data processing were evaluated. Results: The cohort’s average age was 62.4 years, with 24.2% of participants being female. Physician-confirmed AF recurrence was noted in 26.7% of patients at 12 months and 49.5% at 24 months. The device data indicated a daily AF burden of ≥6 min in 47.2% at 12 months, with 25.9% surpassing 1 h. AI algorithms decreased false-positive alerts by 21%, resulting in an estimated saving of 19 clinician hours. In patients with pre-ablation ILR data, the median AF burden significantly decreased from 7% to 0.2% (p = 0.017). ILR-guided monitoring affected treatment adjustments, leading to the discontinuation of antiarrhythmic therapy in 36 patients and redo ablations in 8. Conclusions: Continuous ILR monitoring, combined with AI-driven analysis, enables the detection of AF recurrences and burden, thereby facilitating timely therapeutic adjustments.
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Foti et al. (2025) conducted a cohort in paroxysmal or persistent atrial fibrillation (AF) (n=91). Cryoballoon ablation with continuous ILR monitoring vs. Pre-ablation was evaluated on Median AF burden (p=0.017). Cryoballoon ablation with continuous ILR monitoring significantly reduced median AF burden from 7% pre-ablation to 0.2% post-ablation (p=0.017).
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