Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and prosthetic valve replacement . Moderate cardiomegaly is demonstrated . The mediastinal contour is unremarkable except for diffuse atherosclerotic calcifications within the thoracic aorta . Mild pulmonary edema is present with perihilar haziness and vascular indistinctness . Small bilateral pleural effusions are also present , slightly larger on the right . Patchy atelectasis is noted in the lung bases , though infection in the right lung base is not completely excluded in the correct clinical setting . No pneumothorax is identified .
    OUTPUT:
    
Mild congestive heart failure with mild pulmonary edema and small bilateral pleural effusions . Probable bibasilar atelectasis , however infection in the right lung base can not be completely excluded in the correct clinical setting .