Abstract
Angioedema is an oedematous swelling of the mucosa or submucosa of the skin. Acute angioedema represents a clinical emergency when the pharynx or larynx are involved and breathing of the patient is impaired. For rapid and effective treatment it is necessary to differentiate between allergic and non-allergic angioedema. Three of the five subforms of non-allergic angioedema are mediated by bradykinin: renin-angiotensin-aldosterone system (RAAS)-blocker-induced angioedema (RAE), hereditary angioedema (HAE) and acquired angioedema (AAE). Antihistamines, corticosteroids and adrenalin can be used to treat allergic angioedema but are ineffective in acute attacks of non-allergic angioedema. In these events the bradykinin-B2-receptor antagonist icatibant (in HAE, or RAE) or C1-INH concentrate (in HAE, or AAE) are therapeutic options for rapid alleviation of acute angioedema. The following article gives an overview of the diagnostics and treatment in the emergency situation of "acute angioedema", especially if swelling of the head-and-neck region is present.
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