The nurse is reviewing an electrocardiogram (ECG) rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 second and QRS complexes measure 0.06 second. The overall heart rate is 64 beats/minute
What should the nurse interpret these findings as indicating?
1. normal heart function
2. sick sinus syndrome
3. sinus bradycardia
4. first-degree heart block
Correct Answer: 1
All the measurements are within normal limits. The PR and QRS measurements are normal, measuring 0.12 to 0.20 second and 0.06 to 0.10 second respectively. There is not enough information to determine if the patient is experiencing sick sinus syndrome or first-degree heart block. Bradycardia is a heart rate of less than 60 beats per minute.
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