The nurse is caring for a patient with an increasing preload. The nurse realizes that which of the following will occur with this increase in preload?
1. stroke volume will decrease
2. stroke volume will not be affected
3. stroke volume will increase only if the heart rate increases
4. stroke volume will increase
4
Rationale: Within limits, the heart pumps the amount of blood it receives with each beat. This is known as the Frank–Starling Law of the heart. In other words, as preload increases, so will stroke volume, and as preload decreases, stroke volume falls. The patient with an increasing preload will have an increase in stroke volume. The other choices are incorrect.
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