A 35-Year-Old Woman Is Being Evaluated Due to Recent Exertional

A 35-year-old woman is being evaluated due to recent exertional dyspnea and fatigue. She has no prior medical condition and has a sedentary lifestyle. She feels a retrosternal pain accompined with shortenss of breath during exercise. An EKG shows no significant findings. A heart cathetrization is planned. During the procedure, the catheter records periodic pressure changes with a maximum of 25 mm Hg and minimum of 2 mm Hg.  The catheter is advanced further, and then shows periodic pressure changes with a maximum of 25 mm Hg and a minimum of 10 mm Hg.  Assuming the results of the procedure are normal, the first set of readings was most likely obtained from which of the following locations?

A) Left atrium
B) Left ventricle
C) Pulmonary artery
D) Right atrium
E) Right ventricle

Correct Answer:

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