Nifekalant successfully suppressed intra-superior vena cava fibrillation, which complicated the evaluation of the gap of superior vena cava isolation.
Keywords: Nifekalant; atrial fibrillation; immediate recurrence of atrial fibrillation; superior vena cava isolation.
© 2022 The Authors. Journal of Arrhythmia published by John Wiley & Sons Australia, Ltd on behalf of Japanese Heart Rhythm Society.