Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has been extubated . Interval insertion of left pectoral transvenous pacemaker with tip terminating in the right ventricle . No pneumothorax . The sternotomy wires and surgical clips are unchanged . Right lower lobe atelectasis is persistent . The lungs are otherwise clear . No pleural effusion . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Interval insertion of left pectoral transvenous pacemaker with tip terminating in the right ventricle . Overall improved aeration of the lungs with mild right lower lobe atelectasis .