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
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
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. Salt substitutes often contain potassium and should be avoided in clients with hyperkalemia.
B. Citrus juices and bananas are high in potassium and should be avoided in clients with hyperkalemia.
C. A 12-lead ECG may include changes such as peaked T wave, flattened P wave, prolonged PR interval, ST depression, and prolonged QRS duration.
D. A serum sodium level should be obtained but it is not the priority in this case.
Correct Answer is A
Explanation
Rationale:
A. This is important because AFib can lead to blood clots, which may cause bruising or other skin changes.
B. Missing doses of medication can increase the risk of complications in atrial fibrillation.
C. Hypothyroidism is not directly related to AFib. Therefore, this information is not relevant for AFib education.
D. Hypertension is a risk factor for atrial fibrillation.
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