Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual - chamber pacemaker projects over left pectoral region with lead tips in the right atrium and right ventricular apex . Minimal left lower lobe atelectasis and interval improvement in vascular congestion . No pneumothorax , additional focal opacity or pleural effusion . Aortic arch , aortic valve , and mitral valve calcifications noted . No bony abnormality .
    OUTPUT:
    
1 . Interval improvement in vascular congestion . 2 . Minimal left lower lobe atelectasis .