Effects of taurine magnesium coordination compound on potassium current in guinea pig ventricular cardiomyocytes / 中国药理学通报

Aim To investigate the antiarrhythmic mechanism of taurine magnesium coordination compound(TMC)on the potassium current in single ventricular myocytes of guinea pig.Methods Whole-cell patch clamp was used to record IK,IK1 in single ventricular myocytes of guinea pig.Results In ventricular myocytes of guinea pig,IK was decreased from(8.67?1.04)pA/pF to(6.31?1.16)pA/pF at +70 mV.TMC had no effect on the IK1.Conclusions TMC had inhibitory effect on IK directly and this effect maybe resulted in prolonging the action potential duration(APD)and effective refractory period(ERP).It could be one of the basis of antiarrhythmic effect of TMC.