Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously seen trans subclavian AV pacer has been converted to a conventional left - sided pacemaker with lead tips over the right atrium and right ventricle . The right Swan - Ganz catheter has been removed . No pneumothorax is detected . Allowing for technical differences , the cardiomediastinal silhouette is similar . No CHF , focal infiltrate , or gross effusion is detected . There is minimal bibasilar atelectasis and possible minimal blunting of the left costophrenic angle .
    OUTPUT:
    
1 . Cardiomediastinal silhouette is grossly unchanged , allowing for technical differences . 2 . Left - sided dual lead pacer , with lead tips over right atrium and right ventricle . 3 . Doubt acute pulmonary process . Possible minimal blunting of left costophrenic angle and minimal bibasilar atelectasis .