The nurse is reviewing an electrocardiogram rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 seconds, and the QRS complexes measure 0.06 seconds. The overall heart rate is 64 beats/minute. Which would be a correct interpretation based on these characteristics?

Sinus bradycardia

Sinus arrhythmia

Sinus tachycardia

Normal sinus rhythm

Answer and Explanation

The Correct Answer is D

A. Sinus bradycardia: Sinus bradycardia is characterized by a regular rhythm with a heart rate less than 60 beats per minute. In this case, the heart rate is 64 beats per minute, which falls within the normal range, not consistent with sinus bradycardia.

B. Sinus arrhythmia: Sinus arrhythmia typically presents as a variation in the R-R interval with respiration, often seen as an irregularity in the heart rate. The provided characteristics describe a regular rhythm, so sinus arrhythmia is not the correct interpretation.

C. Sinus tachycardia: Sinus tachycardia is characterized by a regular rhythm with a heart rate greater than 100 beats per minute. The heart rate in this case is 64 beats per minute, which is not indicative of sinus tachycardia.

D. Normal sinus rhythm: Normal sinus rhythm refers to a regular rhythm with a heart rate between 60 and 100 beats per minute, P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and normal QRS complex duration (less than 0.12 seconds). The provided characteristics, including regular P waves, regular QRS complexes, a PR interval of 0.16 seconds, and a heart rate of 64 beats per minute, align with a normal sinus rhythm interpretation.

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Correct Answer is B

Explanation

A. "I will wear layered clothing when walking outside in winter": This statement shows an understanding of the need to dress appropriately for weather conditions, which is important in managing symptoms during physical activity.

B. "I will walk early in the morning when it is hot outside": This statement indicates a lack of understanding regarding the ideal timing for outdoor activities, especially in hot weather. Exercising during the cooler parts of the day (such as early morning or late evening) is recommended to avoid heat-related stress and potential exacerbation of cardiovascular symptoms.

C. "If I get shortness of breath, I should slow down a bit": This statement demonstrates an understanding of monitoring symptoms during exercise and adjusting activity levels accordingly, which is an important aspect of managing coronary artery disease.

D. "My exercise intensity should not exceed my ability to talk": This statement reflects an understanding of the recommended exercise intensity level based on the ability to talk comfortably during physical activity, known as the "talk test."

Correct Answer is ["1"]

Explanation

If the nurse needs to administer vancomycin 500 mg PO daily divided into four equal doses, and the available capsules are vancomycin 125 mg each, the nurse would administer:

500 mg total daily dose ÷ 4 doses = 125 mg per dose

Since each capsule contains 125 mg of vancomycin, the nurse would administer 1 capsule with each dose.

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The nurse is reviewing an electrocardiogram rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 seconds, and the QRS complexes measure 0.06 seconds. The overall heart rate is 64 beats/minute. Which would be a correct interpretation based on these characteristics?

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Naxlex Comprehensive Predictor Exams

The nurse is educating a client newly diagnosed with coronary artery disease. What statement by the client would lead the nurse to understand more teaching is needed?

Correct Answer is B

Explanation

A nurse is preparing to administer vancomycin 500 mg PO daily divided into four equal doses. The amount available is vancomycin 125 mg capsules. How many capsules should the nurse administerwitheachdose?

Correct Answer is ["1"]

Explanation

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