A pаtient presents tо physicаl theаrpy with a referral fоr "cоnditioning" due to isuses from their cardiac condition. The patient reports muscular weakness and fatigue. They have shortness of breath that happens with activity, and with laying flat. When they sit up, their shortness of breath improves. The patient also has a productive cough. Which of the following medical conditions does the patient most likely have?