ATI LPN
Cardiovascular Questions and Answers PDF Questions
Question 1 of 5
The amount of blood pumped by one ventricle in one minute is called:
Correct Answer: D
Rationale: Cardiac output is a combination of stroke volume and heart rate. Stroke volume is the volume of blood pumped by the left ventricle of the heart per beat. Heart rate is the number of beats of the heart per minute (bpm).
Question 2 of 5
When recording lead I on an ECG, the right arm is the negative electrode, and the positive electrode is:
Correct Answer: A
Rationale: In lead I, the right arm is negative, and the left arm is positive, measuring the potential difference across the arms.
Question 3 of 5
A 30-year-old man has an ejection fraction of 0.25 and an end systolic volume of 150 ml. What is his end-diastolic volume?
Correct Answer: D
Rationale: Ejection fraction = SV/EDV; SV = EDV - ESV. Given EF = 0.25 and ESV = 150 ml, SV = 50 ml, so EDV = 200 ml.
Question 4 of 5
Venous return is determined by:
Correct Answer: D
Rationale: All listed factors—blood volume, venous capacity, and muscle activity—affect venous return.
Question 5 of 5
Which of the following is unable to protect the cell against free radical damage?
Correct Answer: B
Rationale: Xanthine oxidase generates free radicals, unlike the others which neutralize them.