ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
A thrombus is:
Correct Answer: D
Rationale: A thrombus (D) is a clot on vessel walls.
Question 2 of 5
The myocardium would be the thickest in the
Correct Answer: B
Rationale: The left ventricle (B) has the thickest myocardium to pump blood into the high-pressure systemic circuit.
Question 3 of 5
Which of the following is a positive inotrope?
Correct Answer: C
Rationale: Calcium (Ca²⁺, C) is a positive inotrope, enhancing contractility by increasing sarcomere interaction.
Question 4 of 5
A client has been taking Viagra and is now experiencing angina. The physician has prescribed nitroglycerin p.r.n. for the angina. Which of the following should the nurse include in the discharge instructions?
Correct Answer: A
Rationale: Viagra and nitroglycerin (A) together cause severe hypotension; a 24-hour gap is required. Other options (B, C, D) are incorrect per manufacturer guidelines.
Question 5 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.