[Feasibility of combination mapping utilizing a duo-decapolar electrode catheter and the CARTO system for incisional reentrant atrial tachycardia with cycle length alternation: a case report].

A 43-year-old woman had undergone patch closure operation for atrial septal defect 27 years ago. She was referred to our hospital for evaluation of frequent palpitations since 1 year ago. Electrophysiological study was performed with recording of the coronary sinus, His bundle, and low lateral right free wall electrography utilizing a steerable duo-decapolar electrode catheter(Livewire, Daig).