The patient tells the nurse, "This educational video you gave me shows normal electrical conduction through the heart, but I still don't understand it. Can you explain it to me?" What is (are) the nurse's best response(s)?
1. "Conduction through the bundle of His is the slowest in the heart."
2. "Conduction begins in the sinoatrial (SA) node and travels to the atrioventricular (AV) node.
3. "Conduction continues through the bundle branches to the Purkinje fibers."
4. "Conduction travels from the atrioventricular (AV) node through the bundle of His."
5. "The sinoatrial (SA) node is located in the left atrium."
Correct Answer: 2,3,4
Rationale: Conduction through the heart originates in the sinoatrial (SA) node, travels through the atrioventricular (AV) node through the bundle of His to the right and left bundle branches to the Purkinje fibers. Conduction through the atrioventricular (AV) node is the slowest in the heart. The sinoatrial (SA) node is located in the right atrium.
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