2.2 Transmembrane potentials and potassium currents in vitro
Hypoxia led to shortening of action potential duration (APD) of isolated cardiomyocytes at 5.4 mM of [K+] and did not change APD at 1.3 mM of [K+] o (Fig. 4). The current density of IK1 and IK(ATP) current was lower at 1.3 mM than at 5.4 mM of [K+] (Fig. 5).
DISCUSSION