应用常规细胞内微电极技术和一支细胞外玻璃吸引电极,观察低Ca~(2+)对豚鼠心室乳头肌电缆特性及动作电位传导速度的影响.实验结果表明,1/6正常Ca~(2+)浓度(0.3mmol/L)溶液灌流时,与正常对照相比,空间常数减小23.9%(p<0.01),细胞内纵向电阻增大37.1%(p<0.01),动作电位传导速度减小16.1%(p<0.01).单纯缺氧时,与正常对照相比,空间常数减小29.4%(p<0.01),膜时间常数减小30.01%(p<0.01),细胞内纵 The effects of low Ca2 + on the characteristics of the cable and action potential conduction velocity in guinea pig ventricular papillary muscles were observed by the conventional intracellular microelectrode technique and an extracellular glass aspiration electrode.The experimental results showed that 1/6 normal Ca ~ (- (P <0.01), the longitudinal resistance increased 37.1% (p <0.01), the action potential conduction velocity Decreased by 16.1% (p <0.01) .The spatial constant decreased by 29.4% (p <0.01) and the membrane time constant decreased by 30.01% (p <0.01) compared with the normal control,