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Questions and Answers
What is the percentage of left ventricular output that flows into the descending aorta in a fetus?
What is the percentage of left ventricular output that flows into the descending aorta in a fetus?
- 25% (correct)
- 10%
- 33%
- 65%
During fetal hypoxia, what is responsible for the increase in heart rate?
During fetal hypoxia, what is responsible for the increase in heart rate?
- Decreased vagal stimulation
- Increased drive (correct)
- Transiently decreased heart rate
- Chronic hypoxia
Which factor contributes to an increase in stroke volume during gestation?
Which factor contributes to an increase in stroke volume during gestation?
- Decreased preload
- Decrease in ventricular size
- Increased contractility (correct)
- Increased afterload
What is the primary mechanism for decreasing pulmonary vascular resistance at birth?
What is the primary mechanism for decreasing pulmonary vascular resistance at birth?
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After birth, what leads to the reversal of the pulmonary systemic pressure gradient?
After birth, what leads to the reversal of the pulmonary systemic pressure gradient?
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What leads to the closure of the ductus arteriosus after birth?
What leads to the closure of the ductus arteriosus after birth?
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Which shunt undergoes functional closure within minutes after birth?
Which shunt undergoes functional closure within minutes after birth?
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