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.

Nursing Test Bank

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Correct Answer is C

Explanation

Rationale:

A. This is wrong because the ECG leads show ST segment elevation.

B. Stable angina may present with ST segment depression in an ECG unlike in the strip shown above which depicts an ST segment elevation.

C. This is correct because of the ST segment elevation.

D. Unstable angina may have hyperacute T wave, flattening of the T waves, inverted T waves or an ST depression unlike in the above ECG strip.

A. Notify the provider of a weight gain of 0.5 kg (1 lb) in a week. B. It is okay to skip a dose of diuretic. C. Check weight daily when it is easiest. D. Call the provider if you gain 2 lbs. in 24 hours

Correct Answer is D

Explanation

Rationale:

A. A weight gain of 0.5 kg (1 lb) in a week is not typically concerning for heart failure exacerbation.

B. Skipping a dose of a diuretic can lead to fluid retention and exacerbate heart failure symptoms.

C. Weighing daily is important for monitoring fluid retention, but the specific time of day is not as crucial as consistent timing.

D. A weight gain of 2 lbs. in 24 hours can indicate fluid retention and worsening heart failure.

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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

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Correct Answer is C

Explanation

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Correct Answer is D

Explanation

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