• Ventricular fibrillation arises when eletrical waves are discharged from multiple rapid-firing ventricular automaticity foci continuously and rapidly (creating micro-reentrant circuits), which depolarize ventricular cells but not completely.
• Because venticular cells are depolarized so quickly, the resulting ventricular contraction is rather inefficient thus only rapid, erratic tracing with no identifiable rhythm is seen.
• Due to uncoordinated ventricular contraction, the heart cannot pump blood adequately leading to cardiac arrest.
