Anaphylaxis: pathophysiology, clinical presentations and treatment.

Area of Science:

• Allergy and Immunology
• Emergency Medicine
• Pharmacology

Background:

• Anaphylaxis and anaphylactoid reactions are sudden, life-threatening episodes caused by chemical mediators.
• Common fatal triggers include penicillins, iodinated contrast material (ICM), and hymenoptera stings.
• Upper airway obstruction and circulatory collapse are leading causes of death.

Purpose of the Study:

• To review the pathophysiology, symptomatology, and treatment of anaphylaxis.
• To highlight the underappreciated cardiovascular involvement and hypovolemia in hypotensive patients.
• To emphasize the critical role of prompt airway management, cardiac monitoring, and IV access.

Main Methods:

• Comprehensive literature review.
• Analysis of pathophysiology and clinical presentation.
• Evaluation of current treatment strategies.

Main Results:

• Cardiovascular involvement in anaphylaxis is frequently underestimated.
• Hypotensive patients with anaphylaxis can be significantly hypovolemic.
• Epinephrine is the cornerstone of pharmacologic therapy.

Conclusions:

• Immediate attention to airway, cardiac monitoring, and IV access are crucial.
• Preventing or reversing complications is the primary treatment goal.
• A thorough understanding of anaphylaxis is essential for effective management.