Physiology of Pregnancy & Antenatal Care · NEET PG Preparation Obstetrics & Gynaecology
A 30-year-old G2P1 at 28 weeks of gestation comes for an antenatal check-up. Her blood pressure is 110/70 mmHg. Which of the following cardiovascular…
Practice question from Physiology of Pregnancy & Antenatal Care (NEET PG Preparation Obstetrics & Gynaecology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-ECEF33
A 30-year-old G2P1 at 28 weeks of gestation comes for an antenatal check-up. Her blood pressure is 110/70 mmHg. Which of the following cardiovascular adaptations is typically observed at this stage of gestation compared to the non-pregnant state?
- A.Increased systemic vascular resistance (SVR)
- B.Increased cardiac outputCorrect answer
- C.Elevated mean arterial pressure (MAP)
- D.Decreased heart rate
Solution
Cardiac output increases significantly during pregnancy (by 30-50%), driven primarily by an increase in stroke volume and a moderate increase in heart rate (by 10-20 beats/min). Systemic vascular resistance (SVR) and mean arterial pressure (MAP) fall due to systemic vasodilation mediated by progesterone, nitric oxide, and prostacyclin.
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