What are the common signs of anaphylactic shock?

Anaphylactic shock is a severe and potentially life-threatening allergic reaction that occurs rapidly after exposure to an allergen. The hallmark of anaphylaxis includes massive vasodilation, which leads to a significant drop in blood pressure, and this can progress to cardiac arrest if not treated promptly. The body's response involves the release of various mediators, such as histamine, from mast cells and basophils, resulting in widespread vascular permeability and fluid leakage. This systemic response can cause the heart to malfunction, leading to decreased cardiac output and ultimately, cardiac arrest.

Recognizing these signs is critical for effective emergency intervention, as the management of anaphylactic shock requires immediate administration of epinephrine and other supportive treatments to restore hemodynamic stability and ensure adequate oxygenation.