Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Marked cardiomegaly appears stable . Moderate enlargement of the left atrium and the pulmonary vasculature demonstrates an upper zone redistribution pattern . Some haze exists in the basal vascularity with some interstitial increased structures , all consistent with mild degree of chronic left - sided CHF . Thoracic aorta has not changed in size and configuration and calcium deposits exist in the wall at the level of the arch as before . There presently no signs of acute discrete pulmonary parenchymal infiltrates and the on previous examination identified scattered patchy parenchymal densities have disappeared .
    OUTPUT:
    
Stable significant cardiac enlargement with evidence of chronic pulmonary congestion but no evidence of acute edema or pleural effusions . The on previous examinations identified suspected pneumonic infiltrates on the right lung base have disappeared .