Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiograph there is a new a small right - sided pleural effusion with associated atelectasis . Previously seen vascular congestion is improved . Severe cardiomegaly is unchanged . There is no a left - sided pleural effusion or pneumothorax . Left - sided tricameral pacemaker pacemaker is redemonstrated with leads in unchanged position .
    OUTPUT:
    
1 . New small right - sided pleural effusion with associated atelectasis . 2 . Interval improvement of vascular congestion . Stable moderate to severe cardiomegaly .