Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 12 :53 is submitted .
    OUTPUT:
    
Heart remains stably enlarged . Lungs are slightly hyperinflated consistent with underlying emphysema . No focal airspace consolidation is seen . No pulmonary edema or pneumothorax . No large pleural effusions . Prominent pulmonary arteries likely reflecting underlying pulmonary arterial hypertension .