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Sterile Pericarditis in Aachener Minipigs As a Model for Atrial Myopathy and Atrial Fibrillation
08:56

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Published on: September 24, 2021

Efficacy of steroid therapy for pacing failure in a patient with chronic myocarditis

Nobuyuki Mitsuya1, Ryoji Kishi, Noriyuki Suzuki

  • 1Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki.

Internal Medicine (Tokyo, Japan)
|April 22, 2004
PubMed

Insights

Steroid therapy stabilized pacing thresholds in a patient with chronic myocarditis by reducing inflammation and fibrosis. However, this treatment did not improve overall cardiac function.

Area of Science:

  • Cardiology
  • Immunology

Background:

  • Chronic myocarditis can lead to progressive cardiac conduction abnormalities, such as increased pacing thresholds.
  • Pacemaker dependency can arise from inflammatory cardiomyopathies, necessitating careful management.

Observation:

  • A 66-year-old male patient experienced a progressive increase in pacemaker pacing threshold over one year due to chronic myocarditis.
  • Biomarkers including serum creatine kinase, cardiac myosin light chains, and pro-collagen III peptide decreased after steroid therapy.

Findings:

  • Steroid therapy successfully decreased and stabilized the patient's pacing threshold, indicating improved electrical conduction.
  • Endocardial biopsy revealed no progression of cardiac fibrosis, suggesting suppression of the inflammatory process.
  • Despite improvements in pacing parameters and reduced fibrosis, cardiac function did not show significant improvement.

Implications:

  • Steroid therapy may be effective in managing pacing threshold issues in chronic myocarditis by mitigating inflammation and fibrosis.
  • The dissociation between improved pacing parameters and unchanged cardiac function highlights the complex pathophysiology of myocarditis.
  • Further research is needed to explore strategies for functional recovery in patients with myocarditis treated with immunosuppressants.

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