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HESI LPN · HESI LPN Medical Surgical Nursing · LPN Cardiovascular System Exam

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

When administering enoxaparin (Lovenox) to a client for DVT prophylaxis, what is the most important lab value to monitor?

A. Platelet count

B. PT/INR

C. aPTT

D. Hemoglobin

Correct Answer: Platelet count

Question 2 of 5

Which structure serves as the major chemoreceptor of the heart?

A. Carotid body

B. Aortic body

C. Vagus nerve

D. SA node

Correct Answer: Carotid body

Question 3 of 5

What does the PR interval measure?

A. Time it takes for the electrical impulse to travel from the atria to the ventricles

B. Measurement of ventricular depolarization

C. Duration of ventricular repolarization

D. Segment representing the time between ventricular depolarization and repolarization

Correct Answer: Time it takes for the electrical impulse to travel from the atria to the ventricles

Question 4 of 5

A client is admitted to the hospital with a dysrhythmia. Which of the following is the most common cause of dysrhythmias?

A. Hypothermia

B. Metabolic acidosis

C. Drug therapy

D. Ischemic heart disease

Correct Answer: Ischemic heart disease

Question 5 of 5

The client is receiving digoxin and has a potassium level of 2.8 mEq/L. What is the nurse's priority action?

A. Hold the digoxin and notify the healthcare provider.

B. Increase the dose of digoxin.

C. Continue the current dose of digoxin.

D. Administer potassium supplements.

Correct Answer: Hold the digoxin and notify the healthcare provider.

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