Resting Activated Inactivated Extracellular Nat m( 40 40 0 8-40 Threshold 三60 Recover A schematic representation of Nat channels cycling through different conformational states during the cardiac action potential. Transitions between resting, activated, and inactivated states are dependent on membrane potential and time. the activation gate is shown as m and the inactivationA schematic representation of Na+ channels cycling through different conformational states during the cardiac action potential. Transitions between resting, activated, and inactivated states are dependent on membrane potential and time. The activation gate is shown as m and the inactivation