A patient is diagnosed with a heart problem that affects preload. How should the nurse describe preload to the patient?
a. Ejection of blood from ventricles
b. Degree of stretch in ventricles before systole
c. Degree of muscle stretch in atrium during diastole
d. Amount of force ventricles exert to open valves and eject blood
ANS: B
The fluid volume returning to the heart (preload) causes stretch in ventricles before systole. The more fluid there is, the greater the stretch can be. A. C. D. These statements do not describe preload.
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