Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP chest radiograph demonstrates an enlarged heart . No overt pulmonary edema is present . Lung volumes are low . There is no large pleural effusion or pneumothorax . A torturous or dilated aorta is noted . No acute osseous abnormality is detected .
    OUTPUT:
    
Enlarged heart without overt pulmonary edema .