Central venous catheter fragment in coronary sinus extending to right ventricular free wall: a case report.

Percutaneous retrieval of catheter fragments that have migrated into the coronary sinus can be particularly challenging, especially when the fragment has limited capturable portions. In our case, the fragment's minimal exposure outside the sinus, its linear orientation towards the right ventricular free wall, and its vigorous synchronous movement with the wall made retrieval difficult, requiring advanced techniques. This report highlights a challenging case of fragment retrieval from the coronary sinus following pinch-off syndrome and underscores that preprocedural computed tomography can provide crucial information for predicting and planning for such complex interventions.