The effects of Viscum coloratum on the fast response action potentials of canine Purkinje's fibers and guinea pig papillary muscles were studied by glass-micro-electrode technique and selective ion blockers in vitro. 用玻璃微电极及选择性膜通道阻滞剂观察了槲寄生注射液对离体狗心脏浦氏细胞及豚鼠心室肌细胞快反应动作电位的影响。