Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly appears increased compared to the prior examination . Indistinctness of the pulmonary vasculature suggest mild to moderate edema . Limited evaluation , but apparent increased opacification of the lung bases may reflect edema , but infection is also a consideration . Right greater than left pleural thickening appears similar compared to the prior examination . Small bilateral pleural effusions are possible . No pneumothorax . A left pectoralis dual - chamber cardiac pacemaker and leads are unchanged in position .
    OUTPUT:
    
Mild to moderate pulmonary edema . Coexisting infection at either lung base can not be excluded given the limitations of this examination . Dedicated PA and lateral radiographs could be considered for further evaluation .