When assessing the patient for hypoxemia, the nurse recognizes that an early sign of the effect of hypoxemia on the cardiovascular system is:
a. heart block.
b. restlessness.
c. tachycardia.
d. tachypnea.
C
Tachycardia can occur as a compensatory mechanism to increase cardiac output and oxygenation. Dysrhythmias may occur; however, they are not an early sign and tend to be premature ventricular contractions. Restlessness is an early neurological sign, whereas tachypnea is an early respiratory sign.
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