The nurse anticipates that the patient will experience a decrease in cardiac output when data collection reveals a(n):
A) Order for the patient to receive digoxin
B) Heart rate of 54 beats per minute
C) Pulse oximetry reading of 98%
D) Increase in preload related to ambulation in the hall
Ans: B
Feedback: Cardiac output is computed by multiplying the stroke volume by the heart rate. Cardiac output can be affected by changes in either stroke volume or heart rate, such as a rate of 54 beats per minute. An increase in preload will lead to an increase in stroke volume. Digoxin increases contractility of the heart and ultimately increases stroke volume. A pulse oximetry reading of 98% does not indicate hypoxemia, as hypoxia can decrease contractility.
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