Case Presentation: A 56-year-old male with WHO Group I/III pulmonary hypertension (PH), Gold Stage III COPD, and right ventricular failure presented with several weeks of gradually worsening dyspnea. One month prior, he was hospitalized for an acute exacerbation of PH and was discharged on an increased dose of ambrisentan after excluding intra-atrial shunting. On the [...]