Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle . Mild cardiomegaly is re - demonstrated with a left ventricular predominance . Mediastinal contour is unchanged with atherosclerotic calcifications noted within a mildly tortuous aorta . Low lung volumes are demonstrated with crowding of bronchovascular structures and mild pulmonary vascular engorgement . Patchy opacities are demonstrated in the lung bases , more so on the left , and perhaps slightly progressed in the interval . Small bilateral pleural effusions are demonstrated . There are no acute osseous abnormalities . Remote fracture deformity of the right proximal humerus is again noted . Osseous structures are diffusely demineralized .
    OUTPUT:
    
Persistent bibasilar patchy opacities , more pronounced on the left , and perhaps slightly worse on the left in the interval . These may reflect areas of atelectasis but infection or aspiration can not be excluded . Mild pulmonary edema and small bilateral pleural effusions .