Automated external defibrillator AED O Ventricular fibrillation may be used by 200J*3 times) 0r200J、200300J、300J @Ir polymorphic ventricular tachycardia can not be clearly distinguished from ventricular fibrillation VE)L> treatment would refer to be as VF 3 Atrial fibrillation 100-200J synchronized Atrial flutter or supraventricular tachycardia 50-100J synchronized ⑤Ⅴ entricular tachycardia 100 J synchronizedAutomated external defibrillator --- AED ① Ventricular fibrillation : may be used by 200J*3 times) or 200J、200-300J、300J ② If polymorphic ventricular tachycardia can not be clearly distinguished from ventricular fibrillation (VF), treatment would refer to be as VF ③ Atrial fibrillation :100-200J synchronized ④ Atrial flutter or supraventricular tachycardia 50- 100J synchronized ⑤ Ventricular tachycardia 100J synchronized