Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable moderate cardiomegaly with mild pulmonary edema . There is a possible small layering right pleural effusion . There is no focal consolidation to suggest pneumonia . There is no pneumothorax . A biventricular pacemaker is in unchanged position .
    OUTPUT:
    
Mild congestive heart failure . Post - diuresis imaging would be more sensitive to detect underlying pneumonia .