MCQ – 89280


A 27-year-old woman comes to the physician because of a 1-month history of progressive shortness of breath. She can no longer walk one block without stopping to catch her breath. Her last menstrual period was 3 months ago. Menarche occurred at the age of 12 years, and menses had occurred at regular 28-day intervals. Cardiac examination shows a grade 3/6, rumbling diastolic murmur at the apex. Laboratory studies show an elevated ß-hCG concentration. Which of the following is the most likely explanation for this patient’s worsening dyspnea?

A. Increased peripheral vascular resistance


Decreased right ventricular preload


Decreased minute ventilation


Increased intravascular volume

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