What Knot to Do: Retrieval of a Kinked and Trapped Coronary Catheter

Abstract Diagnostic coronary artery catheter knotting and kinking are uncommon but potentially catastrophic complications. Our case emphasizes the importance of avoiding this problem and provides recommendations for catheter retrieval in the unlikely event of this complication. To our knowledge, the technique used in our case has not been described before. (Level of Difficulty: Intermediate.)