Steady state activation and inactivation curves for voltage-gated conductances.

<p>The activation and inactivation gating variables for each of the 7 active membrane conductances used are shown. Solid lines represent activation curves and the dotted lines represent inactivation curves. All conductances except the calcium sensitive potassium conductance have been used in previous heartbeat system models <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0079267#pone.0079267-Garcia1" target="_blank">[8]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0079267#pone.0079267-Hill1" target="_blank">[57]</a>.