Anasarca Definition and Clinical Characteristics

Pathophysiologic Mechanisms

• The American College of Cardiology notes that anasarca is characterized by increased capillary hydrostatic pressure, most commonly from cardiac causes, cirrhosis with portal hypertension, or renal failure 3
• The American College of Cardiology also states that decreased oncotic pressure results from hypoalbuminemia due to nephrotic syndrome, severe malnutrition, or hepatic synthetic dysfunction 3

Clinical Presentation and Distinction

• The European Heart Journal describes anasarca as presenting with bilateral pitting edema, which is characteristically bilateral and demonstrates pitting on pressure 2
• The American College of Cardiology and the European Heart Journal distinguish anasarca from localized edema and lymphedema, noting that anasarca is bilateral, lacks the positive Stemmer sign, and results from systemic fluid overload rather than lymphatic obstruction 3, 2
• The European Heart Journal also notes that anasarca represents a more severe and extensive presentation than simple peripheral edema, which may be limited to the lower extremities 2
• The European Heart Journal describes the term "flash pulmonary edema" as acute pulmonary congestion without systemic fluid overload, contrasting with anasarca which reflects chronic total body fluid retention 5