Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable frontal view of the chest was performed . A left - sided pacemaker is present with leads terminating in the right atrium and right ventricle . There is an increased appearance of the interstitium which is thought to reflect mild pulmonary edema , the degree of which is slightly worse than prior . There is no pleural effusion or pneumothorax . The heart remains markedly enlarged . A calcified , enlarged and tortuous aorta is again noted which also accounts for the rightward deviation of the trachea . The imaged upper abdomen is unremarkable . There are no acute osseous abnormalities .
    OUTPUT:
    
Increase prominence of the interstitium is thought to reflect mild pulmonary edema which is slightly worse than prior .