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Three-dimensional mapping discovered arrhythmic substrate missed in the initial diagnosis of idiopathic ventricular fibrillation
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  • Yoshihiro Harano,
  • Keita Masuda,
  • Shunsuke Inoue,
  • Yuto Iioka,
  • Shinya Kowase,
  • Jun Osada,
  • Kazuhiko Yumoto
Yoshihiro Harano
Yokohama Rosai Hospital
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Keita Masuda
Yokohama Rosai Hospital
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Shunsuke Inoue
Yokohama Rosai Hospital
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Yuto Iioka
Yokohama Rosai Hospital
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Shinya Kowase
Yokohama Rosai Hospital
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Jun Osada
Yokohama Rosai Hospital
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Kazuhiko Yumoto
Yokohama Rosai Hospital
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Abstract

A 45-year-old man who was diagnosed with idiopathic ventricular fibrillation (IVF) 12 years ago experienced multiple implantable cardioverter defibrillator shocks due to ventricular tachycardia (VT). The recorded electrocardiogram showed VT originating from the right ventricular outflow tract (RVOT). He underwent catheter ablation for VT, and 3-dimensional (3D) mapping revealed a low voltage area in the RVOT. VT was successfully ablated at this site, and his final diagnosis was scar-related VT, not IVF. We suggest that 3D mapping is useful for the reassessment of IVF because an arrhythmic substrate might have been missed in patients who were initially diagnosed with IVF.