Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker device is noted with lead terminating in the right ventricle . The patient is status post median sternotomy and CABG . The heart remains moderately enlarged . The aorta is tortuous and diffusely calcified . There are low lung volumes . Mild pulmonary vascular engorgement . There is a new moderate - to - large right pleural effusion with associated right basilar atelectasis , and ill - defined retrocardiac opacity likely reflects atelectasis as well . No pneumothorax is demonstrated .
    OUTPUT:
    
New moderate - to - large right pleural effusion with bibasilar atelectasis . Mild pulmonary vascular engorgement .