Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent blunting of the left costophrenic sulcus and the left posterior costophrenic sulcus , compatible with pleural effusion likely with adjacent atelectasis . The remainder of the lung fields are clear , prior retrocardiac opacity has resolved . Moderate cardiomegaly is stable . A left pacemaker / defibrillator has leads terminating in the right atrium via a persistent left superior vena cava and another lead in the right ventricle . There is no pneumothorax .
    OUTPUT:
    
1 . Small left pleural effusion , smaller since the study of ___ , and adjacent atelectasis . 2 . Stable moderate cardiomegaly .