Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest are provided . A left chest wall pacer with single lead is unchanged . The heart is markedly enlarged . There is mild pulmonary ground - glass opacity which could reflect pulmonary edema . There could be a tiny left pleural effusion . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
Marked cardiomegaly with pulmonary edema and tiny left effusion .