Ion shifts over the cardiac membrane resulting in an action potential. This is a low resolution version of this movie made by Rob Kreuger, medical illustrator (www.medischeillustraties.nl), in collaboration with Jonas de Jong, MD and Arthur Wilde, MD, PhD from the AMC, The Netherlands. Higher resolution versions are copyrighted. This video is shown on ECGpedia.org to explain the origin of the electrocardiogram (ECG).
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