A nurse is reviewing the laboratory findings of a client who experienced an acute myocardial infarction 6 days ago. Which of the following laboratory values should the nurse expect to remain elevated at this time?

Troponin T

Creatinine phosphokinase

Myoglobin

Creatinine kinase-MB

Answer and Explanation

The Correct Answer is A

A. Troponin T: Troponin T remains elevated for 10 to 14 days after a myocardial infarction. This protein is highly specific for cardiac muscle injury and is used to confirm myocardial infarction.

B. Creatinine phosphokinase: Creatinine phosphokinase (CPK) typically returns to normal levels within 3 days after a myocardial infarction, so it would no longer be elevated at this point.

C. Myoglobin: Myoglobin rises early after a myocardial infarction but is not specific to heart muscle and returns to normal within 24 hours, so it would not be elevated at this time.

D. Creatinine kinase-MB: Creatinine kinase-MB (CK-MB) usually returns to normal levels within 2 to 3 days after a myocardial infarction, so it is unlikely to still be elevated 6 days later.

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Correct Answer is A

Explanation

A. Emboli: Emboli can form as vegetations break off from the heart valves and travel to other parts of the body, causing complications such as stroke, pulmonary embolism, or organ infarction.

B. A heart murmur: A heart murmur is a common symptom of infective endocarditis but not a complication. It results from valve damage caused by the infection.

C. Petechiae: Petechiae are a manifestation of infective endocarditis, not a complication. They occur due to the damage to blood vessels by emboli or infection.

D. Fever: Fever is a common sign of infective endocarditis due to the ongoing infection but is not considered a complication.

A. Cool skin B. Numbness C. Edema D. Pallor

Correct Answer is C

Explanation

A. Cool skin: Cool skin is not typically associated with thrombophlebitis. It is more common with arterial issues rather than venous problems.

B. Numbness: Numbness is generally a sign of nerve involvement or arterial occlusion, not a classic finding of thrombophlebitis, which primarily affects veins.

C. Edema: Edema is a common finding with thrombophlebitis due to venous inflammation and obstruction of blood flow, which leads to fluid accumulation in the affected limb.

D. Pallor: Pallor is more commonly associated with arterial insufficiency rather than venous issues like thrombophlebitis. Thrombophlebitis often presents with redness and warmth instead of pallor.

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A nurse is reviewing the laboratory findings of a client who experienced an acute myocardial infarction 6 days ago. Which of the following laboratory values should the nurse expect to remain elevated at this time?

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