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1. A nurse is teaching staff about the conduction of the heart. In which
order
will the nurse present the conduction cycle, starting with the first
structure?
1. Bundle of His
2. Purkinje network
3. Intraatrial pathways
4. Sinoatrial (SA) node
5. Atrioventricular (AV) node
b. 4, 3, 5, 1, 2
c. 4, 5, 3, 1, 2
d. 5, 3, 4, 2, 1
ANS: B
The conduction system originates with the SA node, the “pacemaker†of
the heart. The electrical impulses are transmitted through the atria along
intraatrial pathways to the AV node. It assists atrial emptying by delaying
the impulse before transmitting it through the Bundle of His and the
ventricular Purkinje network.
2. A nurse is teaching the patient with mitral valve problems about the
valves in the heart. Starting on the right side of the heart, describe the
sequence of the blood flow through these valves.
1. Mitral
2. Aortic
3. Tricuspid 4. Pulmonic
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