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IgG4 related cardiac disease
Hector Carbajal1, Lindsay Waters, Jovan Popovich
1Houston Methodist Hospital, Houston, Texas ; Weill Cornell Medical College, New York, New York.
Methodist Debakey Cardiovascular Journal
|December 4, 2013
Summary
This case report details a patient with IgG4-related disease presenting with cardiac involvement, including heart block. Positron emission tomography (PET) scans may aid in identifying myocardial involvement in this condition.
Area of Science:
- Immunology
- Cardiology
- Pathology
Background:
- Immunoglobulin G4 (IgG4)-related systemic disease is a multisystemic inflammatory condition.
- Inflammatory pseudotumors with IgG4 pathology can affect various organs.
Observation:
- A patient initially diagnosed with an IgG4-related inflammatory pseudotumor experienced visual symptoms responsive to prednisone.
- Cardiac complications, including chest pain, bradycardia, and third-degree heart block, developed years later, requiring pacemaker implantation.
- Positron emission tomography (PET) revealed extensive IgG4-related disease involvement in multiple organs, including the myocardium and sinoatrial (SA) node.
Findings:
- While direct cardiac pathology confirmation was absent, the clinical presentation and extent of organ involvement strongly suggested IgG4-related cardiac disease.
- This case highlights the potential for IgG4-related disease to manifest with significant cardiac complications.
Implications:
- The findings suggest that IgG4-related systemic disease can affect the heart, potentially leading to conduction abnormalities.
- Positron emission tomography (PET) scanning may be a valuable tool for detecting myocardial and SA node involvement in IgG4-related disease.
- Further research is warranted to understand the mechanisms and long-term cardiac implications of IgG4-related disease.
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