Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is noted with leads terminating in right atrium and right ventricle . Mild cardiomegaly is unchanged . The aorta is unfolded . There is mild pulmonary edema , new in the interval . Small bilateral pleural effusions are also new . Retrocardiac opacity may reflect atelectasis . No pneumothorax is detected . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild congestive heart failure with small bilateral pleural effusions and retrocardiac atelectasis .