Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Redemonstrated is severe cardiomegaly and unchanged appropriate positioning of the dual - chamber pacer device . There is interval development of dense right lower lung opacification concerning for pneumonia . There is no pulmonary edema , large effusion , or pneumothorax .
    OUTPUT:
    
1 . Right lower lobe pneumonia . 2 . Stable severe cardiomegaly .