Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable upright chest radiograph shows that the patient has a pacing device over the right upper chest with intact leads extending to the expected locations in the right atrium and right ventricle . There is increase in perihilar hazy density and new partial obscuration of the left hemidiaphragm compared to study from ___ . Baseline cardiomegaly appears unchanged . Multiple right - sided rib fractures appear subacute or healed .
    OUTPUT:
    
Hazy obscuration of the central pulmonary vasculature and left hemidiaphragm suggesting CHF , though no interstitial lines are visible .