Which statement best describes the chest imaging finding in chronic HF?

Which statement best describes the chest imaging finding in chronic HF?

• A. Clear lungs with normal heart size
• B. Lobar pneumonia
• C. Small heart size
• D. Cardiomegaly with interstitial edema

Answer: (D)

In chronic heart failure, the heart’s reduced pumping ability causes venous congestion and higher pressures in the pulmonary circulation. This leads to fluid backing up into the lungs, so the chest X-ray often shows interstitial edema, manifested as increased lung markings, perihilar fullness, and sometimes Kerley lines. At the same time, the heart often enlarges from dilation and chronic remodeling, so the cardiac silhouette is enlarged. Put together, the finding of cardiomegaly with interstitial edema is the classic radiographic description of chronic heart failure. The other descriptions don’t fit as well: clear lungs with a normal heart size would suggest no edema or heart enlargement; lobar pneumonia would present as localized consolidation rather than diffuse interstitial edema; a small heart size is not typical of chronic HF and would point away from congestive processes.

In chronic heart failure, the heart’s reduced pumping ability causes venous congestion and higher pressures in the pulmonary circulation. This leads to fluid backing up into the lungs, so the chest X-ray often shows interstitial edema, manifested as increased lung markings, perihilar fullness, and sometimes Kerley lines. At the same time, the heart often enlarges from dilation and chronic remodeling, so the cardiac silhouette is enlarged. Put together, the finding of cardiomegaly with interstitial edema is the classic radiographic description of chronic heart failure.

The other descriptions don’t fit as well: clear lungs with a normal heart size would suggest no edema or heart enlargement; lobar pneumonia would present as localized consolidation rather than diffuse interstitial edema; a small heart size is not typical of chronic HF and would point away from congestive processes.