Which of the following clinical conditions are associated with tachycardia? 1. Anxiety 2. Hypoxemia 3. Pain 4. Hypothermia

a. 2 and 4 only
b. 1, 3, and 4 only
c. 1, 2, and 3 only
d. 1, 2, 3, and 4

ANS: C
Most often, sinus tachycardia is caused by anxiety, pain, fever, hypovolemia, or hypoxemia.

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