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138704 Anatomy

A 28-year-old woman in the third trimester of pregnancy has experienced severe dizziness for several days and is admitted to the hospital. During physical examination her blood pressure is normal when standing or sitting. When the patient is supine, her blood pressure drops to 90/50 mm Hg. What is the most likely explanation for these findings?

ACompression of the inferior vena cava
BCompression of the superior vena cava
CCompression of the aorta
DCompression of the common carotid artery
Anatomy
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