USMLE step 2 Mcq 343:A 50-year-old woman has a history of an assymptomatic atrial septal defect

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Question:
A 50-year-old woman has a history of an assymptomatic atrial septal defect, complaining of shortness of breath on exertion, together with peripheral oedema. Clinical examination reveals her to be clubbed and cyanosed. She is suspected of having cor pulmonale.
What is the typical average pulmonary artery pressure in a young person at rest

a) 9/5 mm Hg
b) 15/8 mm Hg
c) 25/17 mm Hg
d) 38/20 mm Hg
e) 64/34 mm Hg


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