Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is bilateral diffuse alveolar airspace opacities , with prominent hila and vascular markings . The cardiac size is normal . There may be a small left - sided pleural effusion but no pneumothorax . Bilateral pacemakers for deep brain stimulation are redemonstrated . Sternotomy wires are intact .
    OUTPUT:
    
Acute pulmonary edema in the setting of known chronic heart failure .