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The nurse is reviewing a patient's electrocardiogram (ECG) tracing. Which of the following are characteristics of normal sinus rhythm (NSR?

A.

QRS interval less than or equal to 0.10 seconds

B.

Heart rate 50-100 bpm

C.

P waves are rounded and inverted, and follow each QRS complex

D.

PR interval 0.34 to 0.43 seconds

Answer and Explanation

The Correct Answer is B

A.    The QRS interval may vary but is typically less than 0.12 seconds in normal sinus rhythm.
B.    Normal sinus rhythm typically has a heart rate between 50 and 100 beats per minute.
C.    In normal sinus rhythm, P waves are typically upright and precede each QRS complex.
D.    The PR interval may vary but is typically between 0.12 and 0.20 seconds in normal sinus rhythm.


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Related Questions

Correct Answer is C

Explanation

A. This meal is high in fat, which may be poorly tolerated after a cholecystectomy, as it can exacerbate symptoms such as diarrhea and abdominal discomfort.
B. This meal is high in fat and may be difficult to digest after a cholecystectomy.

Whole milk can also be rich in fat, which may not be well tolerated.

C. This meal is lower in fat and includes easily digestible foods such as roast turkey and rice, which are generally well tolerated after a cholecystectomy. Gelatin dessert provides a light and refreshing option for dessert without adding excess fat.
D. This meal is high in fat, which may be poorly tolerated after a cholecystectomy, as it can exacerbate symptoms such as diarrhea and abdominal discomfort.

Correct Answer is C

Explanation

A. These values are within the normal range and not indicative of chronic kidney disease.
B. While an elevated BUN is present, the serum creatinine level is within the normal range, which is not consistent with chronic kidney disease.
C. Both BUN and serum creatinine levels are elevated, indicating impaired kidney function and consistent with chronic kidney disease.
D. These values are within the normal range and not indicative of chronic kidney disease.

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