The respiratory therapist is assessing a patient with sinus tachycardia. Which of the following would LEAST likely be a cause of the sinus tachycardia?
a. hypoxemia
b. severe anemia
c. hyperthermia
d. massive hemorrhage
e. beta blocker medications
E
Common abnormal causes of sinus tachycardia include hypoxemia, severe anemia, hyperthermia, massive hemorrhage, pain, fear, anxiety, hyperthyroidism, and sympathomimetic or parasympatholytic drug administration. Beta blocker medication may lead to sinus bradycardia, not sinus tachycardia.
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