ATI LPN
Cardiovascular System Questions Questions
Question 1 of 5
Which one of the following veins can be used in coronary artery bypass?
Correct Answer: D
Rationale: The great saphenous vein is commonly harvested for coronary artery bypass grafting due to its length and accessibility.
Question 2 of 5
Which of the following events occurs at the end of the period of ventricular ejection?
Correct Answer: D
Rationale: The end of ventricular ejection is marked by the closing of the semilunar valves (aortic and pulmonary).
Question 3 of 5
An increase in contractility is determined on a Frank-Starling diagram by:
Correct Answer: B
Rationale: Increased contractility raises cardiac output for the same end-diastolic volume on a Frank-Starling curve.
Question 4 of 5
The free radical nitric oxide is generated in cells by reaction catalyzed by:
Correct Answer: B
Rationale: Nitric oxide synthase (NOS) catalyzes the production of nitric oxide.
Question 5 of 5
A 50-year-old man with familial hyperlipidemia undergoes resection of an abdominal aneurysm. Signs of congestive heart failure develop shortly after surgery. Despite treatment, the patient becomes hypotensive and expires 2 days later. Autopsy reveals marked narrowing of coronary arteries, without thrombosis. Multiple foci of necrosis are found circumferentially around the inner walls of both ventricles. Which of the following is the most likely cause of congestive heart failure in this patient?
Correct Answer: D
Rationale: Subendocardial infarction from severe coronary narrowing explains the CHF and necrosis pattern.