Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient 's clinical condition required examination in sitting semi-upright position using AP frontal and left lateral views . There is marked cardiac enlargement seen involving the left heart . Thoracic aorta is generally widened and elongated , but no local contour abnormalities are identified . Pulmonary vasculature demonstrates an upper zone redistribution pattern , but there is no evidence of advanced interstitial or central alveolar edema . No evidence of acute pulmonary infiltrates are present . The lateral and posterior pleural sinuses are free from any fluid accumulation . No conclusive evidence of any acute rib fracture or pneumothorax , but report on right - sided unilateral rib examination will be issued separately . Our records do not include a preceding chest examination available for comparison .
    OUTPUT:
    
Cardiac enlargement with evidence of mild degree of pulmonary vascular congestion . No evidence of acute infiltrates and no pneumothorax identified . No signs of acute pleural effusion or pulmonary infiltrates .