Distributive shock is most commonly associated with which condition?

• A. Anaphylaxis
• B. Myocardial infarction
• C. Hemorrhagic shock
• D. Tension pneumothorax

Answer: (A)

Distributive shock involves widespread vasodilation and leaky capillaries, leading to a drop in systemic vascular resistance and relative intravascular volume loss. Anaphylaxis fits this pattern because the release of histamine and other mediators causes rapid vasodilation and increased capillary permeability, resulting in hypotension and inadequate tissue perfusion. The other conditions produce different shock types: myocardial infarction leads to cardiogenic shock from impaired heart pumping; hemorrhagic shock is hypovolemic from loss of blood volume; tension pneumothorax causes obstructive shock by restricting venous return. So, anaphylaxis is the condition most associated with distributive shock.