Quiz: Ace Your Exams
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A 23-year-old woman, gravida 1, para 0, at 18 weeks of gestation, comes to the clinic for a routine visit. She does not have any active complaints at this time. Their medical history is noncontributory, and she only takes multivitamins. Cardiac auscultation shows a low-frequency diastolic heart sound that is heard shortly after the second heart sound when the patient lies in the left lateral decubitus. Which of the following labeled phases of the cardiac cycle does this heart sound correspond to?


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