our results indicate that ( a ) in premature action potentials , time as well as voltage are important determinants of ( dv/dt ) max in myocardial and purkinje fibres , ( b ) the kinetics of reactivation of the rapid inward current in cardiac fibres are different from those in nerve and ( c ) plateau duration of premature action potentials in ventricular myocardial fibres is largely determined by the kinetics of reactivation of the slow calcium inward current .
C0027061
myocardial
C0018787
cardiac