Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly appears similar compared to prior . Pulmonary vascular congestion has decreased . The pulmonary arteries are enlarged , suggestive of pulmonary arterial hypertension . No pleural effusion or pneumothorax is seen . Cardiac pacing hardware appears similarly positioned .
    OUTPUT:
    
1 . Decreased pulmonary vascular congestion with stable cardiomegaly . 2 . Enlarged pulmonary arteries , suggestive of pulmonary arterial hypertension .