The sequence of travel by an action potential through the heart is
1 - atrioventricular node, sinoatrial node, atrioventricular bundle, bundle branches, Purkinje fibers.
2 - sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers.
3 - atrioventricular node, sinoatrial bundle, atrioventricular node, bundle branches, Purkinje fibers.
4 - atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches, Purkinje fibers.
5 - Purkinje fibers, atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches.
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