Giant cell myocarditis successfully treated with antithymocyte globuline and extracorporeal membrane oxygenation for...

Area of Science:

• Cardiology
• Immunology

Background:

• Giant cell myocarditis is a rare but aggressive form of myocarditis.
• It often presents with severe left ventricular dysfunction and cardiogenic shock.

Observation:

• A 31-year-old male presented with cardiogenic shock and severely reduced left ventricular ejection fraction (10%).
• Diagnosis of giant cell myocarditis was confirmed via endomyocardial biopsy.

Findings:

• The patient received intensive hemodynamic support, including high-dose inotropes, intra-aortic balloon pump, and venoarterial extracorporeal membrane oxygenation (ECMO) for 21 days.
• Combined immunosuppression therapy, including thymoglobulin, steroids, and cyclosporine, was administered concurrently.
• Successful recovery was achieved with this combined approach.

Implications:

• This case highlights the critical role of sustained hemodynamic support, such as ECMO, in managing acute giant cell myocarditis.
• Effective immunosuppression, particularly regimens including thymoglobulin, is crucial for long-term recovery.
• Prompt diagnosis and aggressive multimodal treatment can lead to full recovery even in severe cases.