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1. Mary is a 60-year-old female with COPD and reduced physical activity due to cardiorespiratory fitness. A cardiopulmonary exercise tests is conducted via cycler ergometer test. Mary is able to produce maximal exercise of 45 watts with a PaO2 of 50 mmHG. Based on these results, how likely is it that Mary has comorbid pulmonary hypertension?
2. Mark is a 68-year-old who presents for acute treatment of worsening symptoms of COPD and describes unilateral lower limb pain. Which of the following would be an appropriate next test for Mark?
3. Studies of vasodilators to date for the treatment of patients with COPD have produced which of the following?