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Sinus Node Rhythms – Pretest

Sinus Node Rhythms – Pretest

  1. 1. Which rate is considered tachycardia?

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  2. 2. Which rate is considered bradycardia?

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  3. 3. True or False: In a normal sinus rhythm, the PR interval is < 120 milliseconds (0.12 seconds) and is consistent across the 6-second ECG strip.

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  4. 4. Interpret the following ECG readings: 

    Regularity: regular

    Rate: 98 bpm

    P wave: uniform in shape; one P wave in front of every QRS complex

    QRS complex: < 120 milliseconds

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  5. 5. A sinus arrhythmia has the following ECG findings:

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