Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is markedly enlarged . The aorta is somewhat tortuous and calcified at its arch . There is mild vascular congestion without frank pulmonary edema . There is streaky bibasilar atelectasis . There is no pleural effusion or pneumothorax identified .
    OUTPUT:
    
Marked cardiomegaly without frank pulmonary edema . Consideration should be given to a possible cardiomyopathy or pericardial effusion . Mild vascular congestion and streaky bibasilar atelectasis .