ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
Sinus arrhythmia
Correct Answer: D
Rationale: Sinus arrhythmia (D) is a normal variation where heart rate increases on inspiration (due to vagal inhibition) and decreases on expiration (vagal tone), common in dogs.
Question 2 of 5
The nurse can best assess the degree of edema in an extremity by?
Correct Answer: B
Rationale: Checking for pitting (indentation after pressure) directly assesses edema severity in an extremity, indicating fluid retention extent. Weighing tracks overall fluid, measuring sizes is less specific, and I/O is indirect.
Question 3 of 5
Which factor is most closely associated with successful smoking cessation?
Correct Answer: C
Rationale: Successful smoking cessation is strongly tied to planning for relapses (e.g., identifying triggers and coping strategies), as it addresses the chronic nature of addiction. Support groups (A) help but are less critical, and B and D ignore the need for comprehensive approaches.
Question 4 of 5
A 70-year-old patient with cardiovascular disease attends group classes on disease process, medications, exercise, nutrition, and stress management. To promote optimal and effective learning, the cardiac-vascular nurse uses which teaching strategy?
Correct Answer: B
Rationale: Customizing teaching to the learner’s interests enhances engagement and relevance, optimizing learning for an older adult. A overwhelms, C is a tool not a strategy, and D contradicts primacy effect (key info first).
Question 5 of 5
The 'lub-dub' sound of the heart is produced by:
Correct Answer: C
Rationale: The 'lub-dub' sound corresponds to the closing of heart valves during the cardiac cycle. The 'lub' is the closing of the atrioventricular valves (mitral and tricuspid) at the start of systole, preventing backflow into the atria. The 'dub' is the closing of the semilunar valves (aortic and pulmonary) at the end of systole. Choices A and B are partial truths, but the full sequence involves both valve types. Choices C and D refer to muscle actions, not the sound’s direct cause.