EMR Lily is called to assess a patient who is having difficulty breathing. When she arrives at the patient’s home, she can see that the patient already has a nasal cannula with low-flow oxygen. He is breathing heavily and must pause now and again to answer Lily’s questions. The patient says that he has fluid buildup in his lungs. He uses the nasal cannula during the day and a CPAP at night, but it is getting harder to get air in. During the rapid body survey, Lily notes that the patient’s feet and ankles are extremely swollen, as are his fingers. What condition is this patient MOST likely struggling with?