Figure 2

Scheme of electrophysiological study. 8xS1 indicates the train of eight basic stimuli; S2-5, up to five extrastimuli; ERP, effective refractory period; VF, ventricular fibrillation; defib, defibrillation; ECMO high, increasing of the ECMO flow to 80-100 mL/kg/min after onset of VF until the sinus rhythm was restored.