A client seen in the clinic with shortness of breath and fatigue is being evaluated for a possible diagnosis of heart failure. Which laboratory result will be the most useful for diagnosing heart failure?

B-type natriuretic peptide (BNP)

Troponin I

Blood urea nitrogen (BUN)

Platelet levels

Answer and Explanation

The Correct Answer is A

A. B-type natriuretic peptide (BNP): BNP levels are elevated in heart failure due to increased pressure and stretch in the heart's chambers. It is a key marker used to diagnose and assess the severity of heart failure.
B. Troponin I: This marker is used to diagnose myocardial infarction (heart attack) rather than heart failure. Elevated troponin levels indicate damage to the heart muscle.
C. Blood urea nitrogen (BUN): BUN levels can be elevated in heart failure due to decreased renal perfusion, but it is not as specific for diagnosing heart failure as BNP.
D. Platelet levels: Platelet levels are not directly related to the diagnosis of heart failure. They are more relevant for assessing clotting disorders and other conditions.

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Correct Answer is D

Explanation

A. They are more prone to hyperthermia and may require cooling measures: Hypothyroidism typically leads to hypothermia (lower body temperature) rather than hyperthermia. Clients with hypothyroidism are more likely to experience difficulty maintaining normal body temperature.
B. Their levothyroxine should be held for 3 days prior to and after the surgery: Levothyroxine should not be held before or after surgery without specific guidance from the healthcare provider. Maintaining consistent thyroid hormone levels is crucial for clients with hypothyroidism.
C. They are at risk of developing tachycardia and should be given propranolol: Hypothyroidism is more commonly associated with bradycardia (slow heart rate) rather than tachycardia (fast heart rate). Propranolol is used to manage symptoms of hyperthyroidism, not hypothyroidism.
D. They are more sensitive to the effects of opioids and may require lower doses: Clients with hypothyroidism often have a reduced metabolic rate, which can increase their sensitivity to medications, including opioids. Therefore, they may require lower doses of opioids to avoid adverse effects.

A. Radioactive iodine therapy B. Levothyroxine C. Ketoconazole D. Propylthiouracil (PTU)

Correct Answer is D

Explanation

A. Radioactive iodine therapy: This is contraindicated during pregnancy as it can harm the fetus and affect thyroid function.
B. Levothyroxine: This is used for hypothyroidism, not hyperthyroidism. For hyperthyroidism, this medication would not be appropriate.
C. Ketoconazole: This is an antifungal and is not used to treat hyperthyroidism.
D. Propylthiouracil (PTU): PTU is the preferred treatment during the first trimester of pregnancy for hyperthyroidism. It inhibits thyroid hormone synthesis and is considered safer than methimazole during early pregnancy.

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A client seen in the clinic with shortness of breath and fatigue is being evaluated for a possible diagnosis of heart failure. Which laboratory result will be the most useful for diagnosing heart failure?

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Naxlex Comprehensive Predictor Exams

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