Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Single lead of a left anterior chest wall generator pack terminates in stable position in the right ventricle . Lung volumes are low , exaggerating heart size and profusion of bronchovascular markings . Moderate enlargement of the cardiac silhouette is similar to prior exams and mediastinal contours are stable . There is mild bibasilar atelectasis but no focal consolidation , pleural effusion , or pneumothorax . Known healing right anterior 2nd rib fracture accounts for focal sclerosis . There is no new displaced rib fracture .
    OUTPUT:
    
1 . Low lung volumes with moderate cardiomegaly and mild bibasilar atelectasis . 2 . No new displaced rib fracture .