Abstract
A 32-year-old woman presented with recurrent episodes of palpitations and documented supraventricular tachycardia (SVT). Five years earlier, she had had similar symptoms and reportedly underwent successful ablation of a manifest left lateral accessory pathway. An electrophysiology study was performed. Quadripolar electrophysiology catheters were placed in the high right atrium, His bundle, and right ventricular (RV) apex. A decapolar catheter (2-8-2 mm spacing) was placed in the coronary sinus with the proximal bipole at the coronary sinus ostium, and the distal bipole was located posterolaterally.
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