ATI LPN
Cardiovascular Questions Questions
Question 1 of 5
If the AV node were forced to assume pacemaker activity, what would be the resulting pulse rate?
Correct Answer: D
Rationale: If the AV node assumes pacemaker activity, the pulse rate typically ranges from 40 to 60 beats per minute.
Question 2 of 5
When teaching the patient with newly diagnosed heart failure about a 2000-mg sodium diet, the nurse explains that foods to be restricted include
Correct Answer: B
Rationale: Yogurt and milk products (e.g., cheese) naturally contain a significant amount of sodium, and the intake of these should be limited for patients on a diet that limits sodium to 2000 mg daily. The other foods listed have minimal levels of sodium and can be eaten without restriction.
Question 3 of 5
Figure 1.18 shows a diagrammatic picture of the cardiac impulse. Using the information in this diagram, describe the flow of blood during the specific stages of the cardiac cycle in relation to the cardiac impulse. In your answer explain how the heart valves help control the direction of blood flow.
Correct Answer: C
Rationale: The cuspid valves open and the semi-lunar valves close during diastole allowing blood to enter the ventricles. During systole, the cuspid valves close preventing backflow, while the semi-lunar valves open allowing blood to exit the ventricles.
Question 4 of 5
Which of the following factors have no effect on blood return?
Correct Answer: A
Rationale: GI motility affects digestion, not venous return, unlike the respiratory pump, muscle contraction, and gravity, which influence venous return.
Question 5 of 5
When recording lead II on an ECG, the positive electrode is the:
Correct Answer: B
Rationale: Lead II uses the left leg as the positive electrode and the right arm as the negative electrode.