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Unstable angina following anaphylaxis
R Ameratunga1, M Webster, H Patel
1Associate Department of Clinical Immunology, Auckland City Hospital, Park Road, Grafton, Auckland 1001, New Zealand. rohana@adhb.govt.nz
Postgraduate Medical Journal
|February 10, 2009
Summary
Severe anaphylaxis can lead to cardiac complications, including unstable angina and cardiac arrest, particularly with intravenous epinephrine administration. Careful patient assessment post-anaphylaxis is crucial for managing complications and preventing recurrence.
Area of Science:
- Cardiology
- Allergy and Immunology
Background:
- Anaphylaxis is a severe allergic reaction requiring prompt treatment.
- Epinephrine (adrenaline) is the first-line treatment for anaphylaxis.
- Coronary artery disease (CAD) can increase cardiac risk during anaphylaxis.
Observation:
- A 55-year-old woman experienced unstable angina after intramuscular epinephrine for anaphylaxis.
- She later had a cardiac arrest following intravenous epinephrine for a second anaphylaxis episode.
- The unstable angina was potentially due to coronary vasospasm or plaque rupture.
Findings:
- Intravenous epinephrine administration in non-monitored settings poses significant cardiac risks.
- Anaphylaxis can precipitate serious cardiovascular events, especially in patients with underlying CAD.
- Delayed recognition and management of post-anaphylaxis cardiac complications can be fatal.
Implications:
- Highlights the critical need for thorough cardiac assessment in patients with anaphylaxis.
- Underscores the dangers of intravenous epinephrine outside intensive care settings.
- Emphasizes the importance of recognizing and managing anaphylaxis-induced cardiovascular complications.
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