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NCLEX Cardiovascular Questions Questions
Question 1 of 5
In comparison to skeletal muscle fibers, the contractile fibers of the heart are depolarized for_____ period of time.
Correct Answer: B
Rationale: Cardiac muscle cells remain depolarized for a longer period due to the plateau phase of the action potential, which helps sustain contraction and prevent tetanus.
Question 2 of 5
Which of the following is another name for the visceral layer of the pericardium?
Correct Answer: B
Rationale: The visceral pericardium is also called the epicardium, adhering to the heart's surface.
Question 3 of 5
As the external iliac artery enters the thigh, its name changes to the:
Correct Answer: B
Rationale: The external iliac becomes the femoral artery in the thigh.
Question 4 of 5
Which of the following most accurately describes what is measured by an electrocardiogram?
Correct Answer: A
Rationale: An ECG measures the electrical activity of the heart, reflecting its conductivity.
Question 5 of 5
On an ECG, the T wave represents:
Correct Answer: D
Rationale: The T wave on an ECG corresponds to the repolarization of the ventricles, which occurs as the ventricular muscles recover their resting state after contraction.