Plain-English translation of NCT06698159 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
Read our Atrial Fibrillation research guide →This study doesn't follow the usual testing phases — it may be an observational study or a different type of research.
Atrial fibrillation is a heart rhythm disorder that doctors often treat with a procedure called ablation, which uses freezing energy to isolate the pulmonary veins in your heart. This trial is testing whether using a slightly larger freezing catheter (31 mm) works better than the standard size (28 mm) at controlling your heart rhythm and keeping it controlled long-term.
Doctors want to know if the larger device improves outcomes without causing harm to your heart's function. As newer, larger ablation devices are being developed, it's important to understand whether they truly offer better results than the standard approach.
You likely qualify if…
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You will undergo a pulmonary vein isolation ablation procedure using one of the two catheter sizes (assigned randomly). The procedure itself is similar regardless of which size you receive — a catheter is guided through your blood vessels to your heart, where freezing energy is applied to isolate the pulmonary veins. The main difference is which device size your doctor uses. You will have follow-up visits and testing to monitor how well your heart rhythm is controlled after the procedure.
AI-generated summary from trial data · Jun 14, 2026 · Not medical advice
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