How can you distinguish cardiac edema from peripheral venous edema?

• A. Venous edema is dependent with skin changes.
• B. Cardiac edema is localized to one limb.
• C. Cardiac edema is symmetric with possible hepatomegaly.
• D. Cardiac edema always causes ascites.

Answer: (C)

Distinguishing edema types relies on pattern and accompanying signs. Cardiac edema from systemic venous congestion tends to be bilateral and symmetric because the elevated venous pressure affects the whole circulation. You often see signs of congestion such as an enlarged liver from hepatic venous back-up (hepatomegaly), and sometimes ascites, reflecting this widespread venous load.

Peripheral venous edema, by contrast, is usually dependent on gravity and related to local venous disease. It commonly affects one leg or is markedly asymmetric, and is often accompanied by skin changes from chronic venous hypertension, like stasis dermatitis, pigmentation, and varicose veins.

So, edema that is symmetric with possible hepatomegaly is characteristic of cardiac edema, distinguishing it from predominantly dependent, skin-change–associated peripheral venous edema.