Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There are low lung volumes which accentuate the bronchovascular markings . Again , there is mild central pulmonary vascular congestion . A left - sided pacemaker is again seen with leads extending to the expected positions of the right atrium and right ventricle . Azygos lobe is incidentally noted . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . No evidence of free air is seen beneath the diaphragms .
    OUTPUT:
    
Low lung volumes with mild central pulmonary vascular congestion , stable . No evidence of free air beneath the diaphragms .