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Angiotensin-Converting Enzyme Inhibitor-Induced Angioedema.

R Gentry Wilkerson1, Michael E Winters2

  • 1Department of Emergency Medicine, University of Maryland School of Medicine, 110 South Paca Street, 6th Floor, Suite 200, Baltimore, MD 21201, USA.

Emergency Medicine Clinics of North America
|November 16, 2021
PubMed
Summary
This summary is machine-generated.

Angiotensin-converting enzyme inhibitor (ACEi) therapy can cause angioedema, a dangerous swelling. This occurs because ACE inhibitors block the breakdown of bradykinin, leading to fluid buildup and potential airway obstruction.

Keywords:
ACE inhibitor–induced angioedemaBradykininC1-inhibitorDifficult airwayQuincke disease

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Area of Science:

  • Pharmacology
  • Emergency Medicine
  • Cardiology

Background:

  • Angioedema is a serious side effect of ACE inhibitor medications.
  • ACE inhibitors disrupt bradykinin metabolism, increasing its levels.
  • Elevated bradykinin causes increased vascular permeability and fluid accumulation.

Purpose of the Study:

  • To review the mechanism of ACE inhibitor-induced angioedema.
  • To highlight the risk of airway compromise in these patients.
  • To emphasize the critical role of emergency physicians in managing this condition.

Main Methods:

  • Literature review on ACE inhibitor-induced angioedema.
  • Analysis of the pathophysiology involving bradykinin.
  • Clinical review of emergency management strategies.

Main Results:

  • ACE inhibitors decrease bradykinin breakdown by inhibiting ACE.
  • Bradykinin over-activation leads to subcutaneous and submucosal fluid accumulation.
  • Facial, lip, tongue, and airway swelling pose a significant risk.

Conclusions:

  • ACE inhibitor-induced angioedema is a life-threatening condition.
  • Prompt airway evaluation and management are crucial for emergency physicians.
  • Understanding bradykinin's role is key to recognizing and treating this complication.