Entrapment of a steerable diagnostic electrophysiologic catheter in the Thebesian valve during radiofrequency catheter ablation for atrial fibrillation

摘要

Intraoperative findings of the entrapped electrophysiologic catheter. The lateral wall of the right atrium was incised. A: Thin membrane-like tissue was wrapped around the tip of the catheter (black arrow). B: After removal of the thin tissue, a furrow (white arrow) was seen near the distal third electrode of the catheter. The catheter was tightened by the remnant of the Thebesian valve. The ostium of the coronary sinus was observed (indicated by yellow arrow).