A patient is in the ER for a suspected myocardial infarction.

The nurse sends a blood sample to the lab.

The patient asked the nurse what laboratory levels would be elevated to indicate an MI. The nurse replies:

Elevated potassium levels.

Elevated CK-MB and Troponin levels.

Elevated Lipid profile.

Elevated WBC count.

Answer and Explanation

The Correct Answer is B

Choice A rationale:
Elevated potassium levels are not a specific indicator of a myocardial infarction (MI). They could be due to other conditions like kidney disease.
Choice B rationale:
Elevated CK-MB and Troponin levels are indeed indicators of an MI. These proteins are released into the blood when heart muscle is damaged.
Choice C rationale:
An elevated lipid profile is a risk factor for heart disease, but it does not indicate an acute MI.
Choice D rationale:
An elevated WBC count could indicate an infection or inflammation, but it is not a specific indicator of an MI.

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Correct Answer is B

Explanation

Choice A rationale:
Temperature does not directly affect cardiac output, which is the volume of blood the heart pumps per minute.
Choice B rationale:
Heart rate is needed to calculate cardiac output as it is the number of heart beats per minute.
Choice C rationale:
Blood pressure is not used in the calculation of cardiac output.
Choice D rationale:
Respiratory rate does not directly influence cardiac output.

A. Cardiac output. B. The cardiac cycle. C. Systole. D. Stroke volume.

Correct Answer is D

Explanation

Choice A rationale:
Cardiac output is the amount of blood the heart pumps through the circulatory system in a minute. It is not the volume of blood ejected from the ventricles during each beat.
Choice B rationale:
The cardiac cycle refers to the sequence of events that occur when the heart beats. It is not the volume of blood ejected from the ventricles during each beat.
Choice C rationale:
Systole is the phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries. It is not the volume of blood ejected from the ventricles during each beat.
Choice D rationale:
Stroke volume is the volume of blood ejected from the ventricles during each beat. This is the correct answer.

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A patient is in the ER for a suspected myocardial infarction. The nurse sends a blood sample to the lab. The patient asked the nurse what laboratory levels would be elevated to indicate an MI. The nurse replies:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is planning to calculate a client's cardiac output. Which of the following data should the nurse obtain to calculate the cardiac output?

Correct Answer is B

Explanation

The nurse is taking care of a patient who is newly diagnosed with heart disease. The patient is asking questions about ejection fraction of the heart. The nurse responds. The nurse understands that the volume of blood ejected from the ventricles during each beat is called.

Correct Answer is D

Explanation

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A patient is in the ER for a suspected myocardial infarction.

The nurse sends a blood sample to the lab.

The patient asked the nurse what laboratory levels would be elevated to indicate an MI. The nurse replies: