Coronary arteritis in systemic lupus erythematosus.

Area of Science:

• Cardiology
• Rheumatology
• Immunology

Background:

• Systemic lupus erythematosus (SLE) can present with cardiac complications, including acute myocardial infarction (AMI).
• The etiology of AMI in SLE patients is often debated, potentially involving either atherosclerosis or a primary arteritis.
• Distinguishing between these causes is crucial for appropriate therapeutic management.

Observation:

• A 45-year-old female with known SLE experienced recurrent anginal pain and multiple AMIs.
• Clinical and serological markers of active SLE were minimal during the cardiac events.
• Serial coronary angiography was performed due to the unusual presentation.

Findings:

• Coronary angiography revealed a saccular aneurysm in a coronary artery supplying an infarcted area, without obstructive lesions.
• Within 18 days, a previously normal coronary artery developed significant obstructive lesions.
• These angiographic findings strongly suggested a coronary arteritis rather than typical atherosclerosis.

Implications:

• This case underscores the diagnostic challenges in differentiating SLE-associated coronary arteritis from atherosclerosis using angiography.
• Serial angiographic assessment is valuable for identifying dynamic changes indicative of arteritis.
• Accurate diagnosis is critical as therapeutic strategies differ significantly for arteritis versus atherosclerosis in SLE patients.