Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacing device has been placed in the interval with a single lead terminating in the right ventricle . The generator pack is in the left anterior chest . There is no evidence of pneumothorax . Heart is enlarged , but there is no evidence of pulmonary edema . Lung volumes have improved since the prior study and a right basilar opacity has nearly resolved with only minimal residual linear atelectasis remaining . Probable very small pleural effusions bilaterally .
    OUTPUT:
    
Pacing lead within the right ventricle . No evidence of pneumothorax .