Arrhythmias & electrophysiology
Rhythm-Guided Pill-in-the-Pocket Anticoagulation Following Cryoballoon Ablation: A COMPARE-CRYO post-hoc analysis
Authors' conclusion
Most patients maintained a consistently low AF burden after cryoablation. Rhythm-guided anticoagulation could substantially reduce OAC, with the ≥1-hour threshold best balancing OAC reduction and time-in-AF coverage. These strategies require prospective evaluation of clinical outcomes.
Study context
- Population
- Patients with paroxysmal atrial fibrillation (AF) undergoing first-time cryoablation139 with CHA2DS2-VA ≥1 in modeling, 108 with recurrence
- Participants
- 201 patients
- Comparison
- Modeled rhythm-guided oral anticoagulation (OAC) strategies (triggered by daily burden ≥6 minutes, ≥1 hour, ≥5.5 hours, ≥23.5 hours with different OAC window durations) in patients with CHA2DS2-VA score ≥1
- Outcome
- Daily AF burden
- Follow-up
- Median 3.3 years
Methodological detailscontinuous implantable cardiac monitor monitoring, AF episodes independently adjudicated, modeled rhythm-guided OAC strategies
- Continuous implantable cardiac monitor monitoring
- AF episodes independently adjudicated
- Modeled rhythm-guided OAC strategies
Main finding
As reported in the abstract
Median daily AF burden
0%
interquartile range = 0%–0.01%
Days with AF absent
96.5%
Further findings
AF burden among 108 patients with recurrence
- Of patients with recurrence, very low burden (<0.1%)
- 40%
- Of patients with recurrence, low burden (0.1%-1%)
- 36%
OAC exposure with modeled strategies (CHA2DS2-VA ≥1)
- Restart-and-continue strategy triggered by AF ≥6 minutes: OAC during follow-up
- 32%
- Pill-in-the-pocket with fixed OAC windows (14 or 30 days): OAC reduction
- 90.8%-99.4%
- ≥1-hour threshold with 30-day window: time in AF covered
- 97.5%
- ≥1-hour threshold with 30-day window: OAC exposure reduction
- 90.8%
- Modeled strategies
Original publication
Rhythm-Guided Pill-in-the-Pocket Anticoagulation Following Cryoballoon Ablation: A COMPARE-CRYO post-hoc analysis. Heart Rhythm. Published 16 September 2026. doi:10.
Summarised from the published abstract; every number is checked against it