A nurse is teaching a newly licensed nurse about evaluating cardiac rhythms. Which of the following best explains calculation of the heart rate?

Look for P waves on the strip

Count how many QRS occur in a 6 second strip

Read the monitor or electrocardiogram interpretation.

Measure the T waves

Answer and Explanation

The Correct Answer is B

Rationale:

A. Looking for P waves is important for assessing atrial activity, but it does not directly calculate heart rate.

B. Counting how many QRS complexes occur in a 6-second strip and multiplying by 10 is a quick and accurate way to calculate heart rate.

C. Reading the monitor or ECG interpretation provides information about the rhythm and morphology of the heart, but it does not directly calculate heart rate.

D. Measuring T waves is important for assessing cardiac repolarization, but it does not directly calculate heart rate.

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Correct Answer is A

Explanation

Rationale:

A. Elevated Troponins indicate myocardial injury or infarction.

B. Elevated Creatine kinase (CK) is an enzyme found in skeletal muscle, brain, and myocardium. Elevated levels can indicate muscle damage.

C. Elevated Hemoglobin is not specific to cardiac injury.

D. Elevated B-type Natriuretic peptide (BNP) is used in the diagnosis and management of heart failure.

A. Hypocalcemia B. Hypernatremia C. Hyperkalemia D. Hypokalemia

Correct Answer is D

Explanation

Rationale:

A. Hypocalcemia is a decreased level of calcium in the blood and is not associated with furosemide use.

B. Hypernatremia is an increased level of sodium in the blood and is not associated with furosemide use.

C. Hyperkalemia is an increased level of potassium in the blood and is not associated with furosemide use.

D. Hypokalemia is a decreased level of potassium in the blood and is a major adverse effect of furosemide use.

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A nurse is teaching a newly licensed nurse about evaluating cardiac rhythms. Which of the following best explains calculation of the heart rate?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is caring for a client with a possible acute myocardial infarction (AMI). The electrocardiogram (ECG) shows no ST segment elevations or depression. The nurse is aware that an elevation of which lab result will determine if there has been cardiac injury?

Correct Answer is A

Explanation

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Correct Answer is D

Explanation

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