Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low , causing exaggeration of the heart size and accentuation of the pulmonary vasculature . The lungs are clear . There is unchanged mild - to - moderate cardiomegaly with persistent left atrial enlargement . The descending thoracic aorta is tortuous , as before . Mediastinal contours are otherwise normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . No acute cardiac or pulmonary findings . 2 . Unchanged mild - to - moderate cardiomegaly , including left atrial enlargement .