Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 03 : 50 is submitted .
    OUTPUT:
    
Lungs remain well inflated without evidence of focal airspace consolidation to suggest pneumonia . Stable postoperative cardiac and mediastinal contours in this patient status post median sternotomy for CABG and transcatheter aortic valve and mitral valve replacement . No pulmonary edema or pneumothorax . No pleural effusions .