An 18 year old female premedical student is concerned because she notices that her heart rate is not regular.

Question: 05
An 18 year old female premedical student is concerned because she notices that her heart rate is not regular. Her blood pressure is 102/65 and her heart rate is 72 beats per minute and is mildly irregular. An EKG is done and shows upright P waves, a PR interval of .12 seconds, a QRS complex of .08 seconds with a normal configuration. Her EKG shows that there is a slight variation in her heart rhythm during respiration. What is this rhythm called?
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a) normal sinus rhythm
b) sinus tachycardia
c) sinus bradycardia
d) sinus arrhythmia
e) junctional rhythm

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