Which laboratory test, when elevated, indicates an increased risk for the development of coronary artery disease?

Creatine kinase level

Homocysteine level

Serum high-density lipoproteins (HDL)

Serum potassium

Answer and Explanation

The Correct Answer is B

A. Creatine kinase is an enzyme released when muscle tissue is damaged, often used in diagnosing muscle injuries or heart attacks, not coronary artery disease risk.

B. Elevated homocysteine levels are associated with an increased risk for coronary artery disease as it can damage the blood vessel walls and promote clot formation.

C. High levels of serum high-density lipoproteins (HDL) are protective against coronary artery disease, not a risk factor.

D. Serum potassium is important for cardiovascular health, but it does not directly correlate with coronary artery disease risk.

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Correct Answer is C

Explanation

A. Accessory muscle use and nasal flaring may occur, but wheezing on exhalation is more typical in lower respiratory issues, such as asthma.

B. Thick mucus plugs and clubbing of the fingers are often associated with chronic conditions like cystic fibrosis, not croup.

C. Croup is a viral illness commonly presenting with fever, a characteristic “barking” cough, increased respiratory rate, and inspiratory stridor due to upper airway obstruction.

D. Frothy pink sputum and crackles are more indicative of pulmonary edema rather than croup.

A. Decrease in circulating epinephrine. B. Sympathetic nervous system (SNS) activity. C. Increase in circulating acetylcholine. D. Parasympathetic nervous system (PNS) activity.

Correct Answer is B

Explanation

A. A decrease in circulating epinephrine would not cause tachycardia; it would likely lead to a reduction in heart rate.

B. Sympathetic nervous system activity is responsible for the increased heart rate (tachycardia) in response to stress, pain, or decreased perfusion, especially during episodes of chest pain in CAD.

C. An increase in circulating acetylcholine, associated with parasympathetic activity, would generally result in a decreased heart rate.

D. Parasympathetic nervous system activity would lead to a decrease in heart rate and would not account for the tachycardia observed in this patient.

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Which laboratory test, when elevated, indicates an increased risk for the development of coronary artery disease?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

Correct Answer is B

Explanation

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