Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding similar study of ___ . There is status post sternotomy related to previous cardiac surgery . The metallic component of a ___ ___'s bileaflet mitral valve prosthesis can be identified in place . The heart is only mildly enlarged with no significant configurational abnormality remaining . Thoracic aorta unremarkable . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present and the lateral and posterior pleural sinuses are free . When comparison is made with the next preceding examination of ___ , no significant interval change can be identified .
    OUTPUT:
    
No evidence of cardiac enlargement , pulmonary congestion or new acute pulmonary infiltrates in this patient with history of left atrial myxoma successfully operated .