Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , a left pectoral pacemaker is seen with transvenous leads in the right atrium and right ventricle . Moderate cardiomegaly is unchanged . Bibasilar atelectasis is increased . No pneumothorax . Median sternotomy wires are intact and aligned .
    OUTPUT:
    
Left pectoral pacemaker with leads in the RA and RV . No pneumothorax .