[An 8-year-old boy with anti-NMDA receptor encephalitis, successfully treated with cyclophosphamide].

We report on an 8-year-old boy with non-paraneoplastic anti-NMDA receptor (NMDAR) encephalitis, who presented with psychotic symptoms and involuntary movement following an intractable seizure. His serum and CSF tested positive for anti-NMDAR antibodies. He received an initial immunotherapy consisting of methylprednisolone pulse therapy (mPSL) and intravenous immunoglobulin therapy (IVIg), without any clinical improvement.

Automated external defibrillator documented degeneration of pre-excited atrial fibrillation into ventricular fibrillation.

Wolff-Parkinson-White (WPW) syndrome can be the cause of syncope or sudden cardiac death, which results from ventricular fibrillation (VF) degenerated from rapid anterograde conduction of atrial fibrillation (AF) to the ventricles through the accessory pathway. We present a case of WPW syndrome in which recording the actual moment of onset of the degeneration of pre-excited AF into VF. This was fortuitous and also lucky for this patient.