Radiofrequency catheter ablation of fast pathway via unconventional right subclavian venous access for atrioventricular nodal reentrant tachycardia.

We report the case of a patient with atrioventricular nodal reentry tachycardia (AVNRT), who was found to have obstruction of the inferior vena cava (IVC) by a calcified mass during an electrophysiologic study (EPS). Subsequently, complete EPS was performed via a combined right internal jugular and subclavian venous access. Successful radiofrequency catheter ablation of the fast pathway was performed via the unconventional right subclavian venous route.