{"nct_id":"NCT02213731","title":"Cryoballoon Ablation for Early Persistent Atrial Fibrillation (Cryo4 Persistent AF)","status":"COMPLETED","status_verified_date":"2025-02","start_date":"2014-12-08","start_date_type":"ACTUAL","primary_completion_date":"2017-06-22","primary_completion_date_type":"ACTUAL","completion_date":"2017-09-12","completion_date_type":"ACTUAL","phases":["NA"],"tickers":["MDT"]}