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 B

Explanation

Rationale:

A. Lanoxin does not typically increase heart rate significantly.

B. Digoxin (Lanoxin) is a positive inotropic agent, meaning it increases the force of cardiac contractions.

C. Lanoxin is commonly used in the treatment of heart failure.

D. Lanoxin does not decrease the force of cardiac contractions.

A. "The test is used to assess the structures and function of the valves and heart muscle" B. "You will not be permitted to eat or drink after midnight C. "During the test there will be slight discomfort in the chest area" D. "The test is used to identify the extent of blockages in the arteries in the heart

Correct Answer is A

Explanation

Rationale:

A. An echocardiogram is a diagnostic test that uses sound waves to create images of the heart's chambers, valves, and surrounding structures, and assesses their function.

B. Fasting is not typically required for an echocardiogram.

C. Discomfort is not typically associated with an echocardiogram.

D. An echocardiogram does not typically assess the extent of blockages in the arteries.

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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 heart failure (HF) and preparing to give a daily dose of Digoxin (Lanoxin). The nurse understands the rationale for giving this medication for HF is which of the following?

Correct Answer is B

Explanation

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Correct Answer is A

Explanation

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