{"nct_id":"NCT05120193","title":"Treatment of Persistent Atrial Fibrillation With Sphere-9 Catheter and Affera Mapping and Ablation System","status":"COMPLETED","status_verified_date":"2025-04","start_date":"2021-12-14","start_date_type":"ACTUAL","primary_completion_date":"2024-01-10","primary_completion_date_type":"ACTUAL","completion_date":"2024-01-10","completion_date_type":"ACTUAL","phases":["NA"],"tickers":["MDT"]}