A 23-Year-Old Woman Is Evaluated for Exercise Intolerance for the Past

A 23-year-old woman is evaluated for exercise intolerance for the past year. Blood pressure is 120/80 mm Hg and pulse is 88/min. On examination, a loud second heart sound was heard at the left second intercostal space. The patient was referred for evaluation with cardiac catheterization. A catheter with a balloon was inserted into the pulmonary circulation. It is advanced until it occludes a branch of the pulmonary system. The pressure is a measure beyond this point. What Does this pressure reading represent?

A) Left atrial pressure
B) Mean arterial pressure
C) Pulse pressure
D) Right atrial pressure
E) Right ventricular systolic pressure

Correct Answer:

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