Effects of vagal stimulation on monophasic action potentials and transmcmbrane potentials of hyperkalcmic rabbit heart / 中国病理生理杂志

ABSTRACT

Effects of vagal stimulation on monophasic action potentials (MAP) and transmembrane potentials (TMP) of hyperkalemic rabbit heart were investigated. The results showed that ventricular conduction block induced by hyperkalemia can be improved by vagal stimulation. Amplitude of MAP (MAPA) and maximum rate of rise of MAP (MVmax) were increased, durations of MAP(MAPD) lengthened. Also in single ventricular cell amplitude of action potential (APA) and maximum rate of rise of action potential (Vmax) were increased, while durations of action potential (APD) lengthened. In addition, MAPD and APD measured at the same site are completely in accordance.