After oxygen is administered, a patient's heart rate changes from 110 to 85 beats/min. The initial tachycardia was most likely caused by which of the following?
a. Anxiety
b. Hypoxemia
c. Hypercapnia
d. Pain
ANS: B
Tachycardia is a sign of hypoxemia. Once the hypoxemia is corrected, their heart rate typically improves.
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Fill in the blank(s) with correct word
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