[Effects of Rbl on action potentials and force of contraction in guinea pig ventricular papillary muscles].

Objective: To evaluate the effects of Rbl on action potentials and force of contraction in guinea pig ventricular papillary muscles.

Method: The ventricular papillary muscles of guinea pig were isolated regularly and immersed with Tyrode, s solution. The effects of Rbl (purified saponins of panaxnotoginseng) on the action potentials (AP), the slow action potentials and the force of contraction (FC) of the muscles were studied.