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Atrial action potential

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Myocardial Action Potential: animation video

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High Speed Imaging of Atrial and Ventricular Action Potential

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Cardiac Conduction System and Understanding ECG, Animation.

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Anatomy & Physiology Online - Cardiac conduction system and its relationship with ECG

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In electrocardiography, the atrial action potential are action potentials that occur in the heart atrium. They are similar to ventricular action potential with the exception of having a more narrow phase 2 due to a smaller calcium influx. Also, in comparison to the ventricular action potential, atrial action potentials have a more gradual repolarization period. This indicates that the atria's repolarization currents are not very large and they do not undergo a large repolarization peak.
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