Practice Question
Cardiac output increases from 30% to 50% by the 32nd week of pregnancy. What is the rationale for this change?
Answer Choices:
Correct Answer:
To provide adequate perfusion of the placenta
Rationale:
🔴 During pregnancy, cardiac output increases significantly (by 30% to 50%), especially by the second to third trimester, to meet the increased circulatory demands of the developing fetus and maternal body.
🔴 The primary reason for this increase is to ensure sufficient blood flow to the placenta, which is the lifeline for nutrient and oxygen exchange between mother and fetus.
🔴 Increased cardiac output also supports expanded maternal blood volume, uterine blood flow, and mammary gland perfusion in preparation for lactation.
🔴 This physiologic adaptation is essential for fetal growth and development, as well as maintaining maternal homeostasis throughout pregnancy.
🔴 While waste elimination and hydration are important, placental perfusion is the central driving factor for the rise in cardiac output.
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This question is from LPN Mental Health-2025 Summer Exam which contains 64 questions.
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Question Details
- Category: LPN Nursing Exam(s)
- Subcategory: LPN ATI Exams
- Domain: Mental Health
- Answer Choices: 4