Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate - to - severe cardiomegaly , which appears stable compared to the prior exam , however , increased in size compared to the exam from ___ . Chronic left mediastinal shift is redemonstrated , most likely secondary to pleural thickening and potential atelectasis at the left lung base . Again seen is mild pulmonary vascular engorgement with mild bilateral pulmonary edema . The pacemaker lead terminates in the expected position of the right ventricle . There appears to be a stable small left pleural effusion . There is no pneumothorax .
    OUTPUT:
    
No evidence of a pneumothorax . Stable appearance of the chest otherwise .