Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior radiograph , lung volumes are lower , which can cause crowding of bronchovascular structures . However , mild cardiomegaly and increased interstitial markings are new since ___ , reflecting heart failure . No pleural effusion or focal consolidation identified .
    OUTPUT:
    
M ild cardiomegaly and early interstitial edema new since ___ reflect heart failure .