Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacer has leads terminating in the right atrium and right ventricle . Diffuse increased interstitial markings , peribronchial cuffing and perihilar airspace opacities is concerning for pulmonary edema . There is a small left pleural effusion . No pneumothorax is identified . The aortic knob is calcified . There is moderate cardiomegaly .
    OUTPUT:
    
Moderate pulmonary edema and cardiomegaly slightly worse compared to the prior radiograph obtained two hours prior .