What causes edema in lower extremities secondary to right-sided heart failure?

💡 Explanation

Edema develops due to increased venous pressure, because right-sided heart failure leads to backflow and congestion in the venous system, elevating hydrostatic pressure in lower extremity vessels. Therefore, fluid shifts into interstitial spaces, rather than being reabsorbed due to normal pressure gradients.

• Why does the influenza vaccine require annual reformulation, even with an adjuvant enhancing initial immunogenicity?
• During intense exercise, why does skeletal muscle fatigue accelerate if phosphofructokinase (PFK) activity declines due to accumulating intracellular hydrogen ions?
• What causes increased interstitial fluid pressure that leads to lymphedema following removal of axillary lymph nodes during a radical mastectomy?
• If a patient with a genetic defect in the complement system develops a bacterial infection, which immunological deficiency is most likely?
• In rheumatoid arthritis, what causes the persistence of inflammation, despite the presence of anti-inflammatory cytokines?
• What distinguishes glycogen synthesis from gluconeogenesis in the liver during periods of hyperglycemia?