Review Question - QID 109070

A 30-year-old woman presents to the clinic with shortness of breath while on her hiking and skiing trip to Colorado. She explains that this was the first time she has gone this high into the mountains and is slightly concerned as she becomes more short of breath with physical activity than prior to her trip. She is otherwise healthy, and her physical exam and vitals are unremarkable. The patient is reassured that she is in good health. She plans to stay on this trip for 2 months. At the end of the patient's trip, which of the following is most likely to be seen in this patient?