A 50-year-old man underwent cardiac electrophysiology study for palpitations. Under fluoroscopic guidance, 1 deflectable decapolar and 2 quadripolar diagnostic catheters
were introduced smoothly into the right femoral vein and up the inferior vena cava (IVC) till the level of the right diaphragm. Using biplane fluoroscopic views at left anterior
oblique 30 degrees and right anterior oblique 30 degrees, several attempts at coronary sinus cannulation with the decapolar catheter were unsuccessful. In the course of catheter manipulation, it became entrapped at the position shown in Figure 1. Attempts to pull the catheter out met with marked resistance. At this point, the patient did not complain of any chest pain.
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