Rhythm Interpretation第 9 / 100 题
A sleeping athlete on telemetry shows a regular rhythm at 52 beats per minute with an upright P wave before each narrow QRS and a PR interval of 0.16 second. How should this rhythm be identified?
a.Normal sinus rhythm
b.Junctional escape rhythm
c.Sinus bradycardia
d.Second-degree AV block
解析
Every measurement is normal except the rate, which is below 60, so the rhythm is sinus bradycardia. Normal sinus rhythm requires a rate of at least 60. A junctional escape rhythm would show absent or inverted P waves, and a second-degree AV block would show P waves that are not all followed by a QRS complex.
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