Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate stable marked cardiomegaly . There is a right pectoral cardiac pacer with a single lead terminating in the right ventricle . The mediastinal and hilar contours are within normal limits . Minimal unfolding of the thoracic aorta is noted , with arch calcifications . The lungs are relatively well aerated . Apparent increased lower lobe opacity on one of the lateral views does not persist on a second lateral view , felt to most likely represent summation of shadows from normal vascular structures . There is no pneumothorax or large effusion . Remote rib fracture is present on the right .
    OUTPUT:
    
1 . No definite evidence to suggest pneumonia . 2 . Stable massive cardiomegaly without definite evidence to suggest decompensation .