The nurse is caring for a client who is newly admitted with severe chest pain and suspected myocardial infarction. Which diagnostic blood test would be considered the most reliable and critical indicator of myocardial injury?

Troponin

Alkaline phosphatase

Creatine kinase

Myoglobin

Answer and Explanation

The Correct Answer is A

A. Troponin: Troponin is the most specific and reliable biomarker for myocardial injury. Levels rise within 3-6 hours and remain elevated for days, providing diagnostic and prognostic information.

B. Alkaline phosphatase: This is related to liver and bone disorders, not cardiac events.

C. Creatine kinase (CK): While CK-MB is specific to cardiac tissue, it is less specific and remains elevated for a shorter period compared to troponin.

D. Myoglobin: Myoglobin is an early but nonspecific marker of muscle damage and is not as reliable for diagnosing myocardial injury.

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Correct Answer is ["A","C","D"]

Explanation

A. Pharmacological toxins can contribute to myocarditis, as certain drugs may induce inflammatory responses in the myocardium.

B. Pleural infusion is incorrect. Pleural infusion, or pleural effusion, is not directly associated with myocarditis.

C. Autoimmune disorders such as lupus and rheumatoid arthritis can predispose individuals to myocarditis due to immune system dysregulation.

D. Viral infections are a major cause of myocarditis, particularly infections like coxsackievirus, parvovirus B19, and HIV.

E. Peripheral vascular disease is incorrect. While peripheral vascular disease is related to poor circulation, it does not directly contribute to the development of myocarditis.

A. Inability to see objects on one side of the visual field B. Inability to perform a previously learned action C. Inability to repeat a simple sentence D. Inability to hear from the ear on the affected side

Correct Answer is B

Explanation

A. Inability to see objects on one side of the visual field: This describes hemianopsia, not apraxia.

B. Inability to perform a previously learned action: Apraxia is the loss of the ability to perform skilled movements or gestures despite having the desire and physical ability to do so.

C. Inability to repeat a simple sentence: This describes aphasia, specifically expressive or receptive aphasia.

D. Inability to hear from the ear on the affected side: This describes hearing loss, which is unrelated to apraxia.

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The nurse is caring for a client who is newly admitted with severe chest pain and suspected myocardial infarction. Which diagnostic blood test would be considered the most reliable and critical indicator of myocardial injury?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is ["A","C","D"]

Explanation

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Correct Answer is B

Explanation

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