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Hypersensitivity myocarditis associated with ephedra use.

S M Zaacks1, L Klein, C D Tan

  • 1Rush Presbyterian St. Luke's Medical Center, Chicago, Illinois 60612, USA.

Journal of Toxicology. Clinical Toxicology
|August 28, 1999
PubMed
Summary
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Ephedra (Ma Huang) may cause hypersensitivity myocarditis. A patient using Ephedra experienced heart inflammation, which resolved after discontinuing the herb and receiving treatment.

Area of Science:

  • Cardiology
  • Toxicology
  • Immunology

Background:

  • Ephedrine is a known cause of vasculitis.
  • Myocarditis has not been previously linked to ephedrine or Ephedra.

Observation:

  • A 39-year-old male with hypertension presented with symptoms of heart failure after using Ephedra (Ma Huang) for 3 months.
  • Cardiac catheterization revealed normal coronary arteries, a dilated left ventricle, and pulmonary hypertension.
  • Right ventricular biopsy showed lymphocytic infiltrate with increased eosinophils, indicative of myocarditis.

Findings:

  • Ephedra (Ma Huang) is suspected as the cause of hypersensitivity myocarditis.
  • Treatment with immunosuppressants and diuretics led to improved cardiac function and resolution of myocarditis.
  • Repeat biopsy confirmed no evidence of myocarditis after 2 months.

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Implications:

  • This case highlights the potential cardiotoxicity of Ephedra (Ma Huang).
  • Clinicians should consider Ephedra-induced hypersensitivity myocarditis in patients with unexplained heart inflammation.
  • Further research is warranted to understand the mechanisms of Ephedra-induced myocarditis.