“In K+-depolarized ventricular muscles OPC -8212 increased overshoot potentials and durations of slow response action potentials in the presence of atenolol.”
“In ventricular muscles OPC -8212 increased plateau potentials of normal action potentials in the presence of atenolol.”
“In ventricular muscles OPC -8212 shortened total duration of contraction and time to peak tension in the presence of atenolol.”