Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual - lead pacemaker / ICD device appears unchanged . The cardiac , mediastinal and hilar contours are stable . There is a moderate , somewhat increased interstitial abnormality suggesting mild congestive heart failure . The lungs show no definite focal opacity , however . There is no definite pleural effusion , although posterior costophrenic sulci are difficult to assess and are partly excluded . Mild degenerative changes are present throughout the thoracic spine . The bones are probably demineralized to some extent . The patient is status post partly visualized left shoulder replacement .
    OUTPUT:
    
Findings consistent with mild interstitial pulmonary edema .