2. Classification (1)病因分类( Classification of etiology (2)休克的始动环节分类 (Classification by initial changes of shock) A Hypovolemic shock A Vasogenic shock , Cardiogenic shock（2）休克的始动环节分类 （Classification by initial changes of shock） Hypovolemic shock Vasogenic shock Cardiogenic shock 2．Classification （1）病因分类（Classification of etiology）