A 50-year-old woman was admitted to the hospital for further workup of symptoms of progressive shortness of breath and lower extremity edema. Over the past 6 months leading up to her hospital admission, she became virtually incapacitated by shortness of breath. She also complained of weight gain and ankle swelling. Her exercise tolerance was reduced to walking several feet at a time. She received therapy with an inhaler and a short course of steroids with taper from her primary care doctor, but her condition did not improve.