Skip to main content
. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: Nat Rev Cardiol. 2013 Apr 16;10(6):317–329. doi: 10.1038/nrcardio.2013.53

Figure 1.

Figure 1

The relationship between ionic currents and the duration of the atrial action potential. The action potential is initiated by a rapid influx of Na+ ions (phase 0), followed by early (phases 1 and 2) and late (phase 3) stages of repolarization, before returning to the resting membrane potential (phase 4). Repolarization is controlled by a balance between inward (red) and outward (blue) currents. The genes encoding the major currents of the atrial action potential are shown. *Function-modifying subunit. ‡Mutation in this gene associated with atrial fibrillation.