Figure 1From: The protective effects of a phosphodiesterase 5 inhibitor, sildenafil, on postresuscitation cardiac dysfunction of cardiac arrest: metabolic evidence from microdialysisDiagram of protocol of the first ventricular fibrillation. Ventricular fibrillation (VF) was induced by a temporary pacemaker conductor connected to an electrical stimulator programmed in the S1/S2 mode (300/200Â ms). CPR, Cardiopulmonary resuscitation; ROSC, Restoration of spontaneous circulation.Back to article page