Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate well - expanded and clear lungs . Heart is larger than expected , but pulmonary vasculature are within normal limits . Mediastinal contour is unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No acute intrathoracic abnormality . 2 . Heart is larger than expected , but no evidence of congestive failure .