Figure 1
From: Propagated repolarization of simulated action potentials in cardiac muscle and smooth muscle
Cardiac Muscle and Smooth Muscle. Circuit diagram used for study of propagated repolarization in cardiac muscle and smooth muscle. A: 5-cell chain. A depolarizing stimulating pulse (IS1; 0.50 ms, 0.25 nA) was applied to the inside of the first cell (A1; left side). A hyperpolarizing pulse (IS2; variable intensity and duration) was applied to the inside of the fifth cell (A5; right side) a few milliseconds later when the action potentials (APs) initiated by IS1 were in their plateau phase (peak overshoot). B: Enlarged diagram to show a portion of the circuit for details of the basic units.