The nurse is providing community education about heart disease. Place the following steps of the cardiac conduction pathway in the order the nurse would present them
1. Action potential moves over the bundle branches
2. Action potential moves through the AV node
3. SA node generates an action potential
4. Action potential travels across the bundle of His
5. Action potential crosses the Purkinje fibers.
3,2,4,1,5
Global Rationale: Once an action potential is generated in the SA node, it moves to the AV node, across the bundle of His, across the bundle branches, and through the Purkinje fibers. It is at this point that the action potential reaches the ventricles, causing the muscle to contract.
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