Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with single lead terminating in the right ventricle . Moderate to severe cardiomegaly is re - demonstrated . Dense atherosclerotic calcifications are noted at the aortic knob . Moderate pulmonary edema is noted , along with a small to moderate size right pleural effusion which is partially loculated laterally , as well as a small left pleural effusion . Overall , findings are not substantially changed from the prior exam . Opacification at the lung bases likely reflect areas of atelectasis . No pneumothorax is detected . There are no definite acute osseous abnormalities .
    OUTPUT:
    
Moderate pulmonary edema and small to moderate bilateral pleural effusions , not substantially changed from prior . Bibasilar opacities , likely atelectasis .