Understanding Lab Tests for Lyme Carditis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Lyme carditis is a rare but serious complication of Lyme disease that affects the heart tissue. This condition can cause heart block, irregular heartbeats, chest pain, and shortness of breath. Since Lyme carditis results from an underlying Lyme disease infection, accurate diagnosis relies on specific blood tests that detect antibodies to the Lyme bacteria.
Recommended Test
Lyme Disease Antibody with Reflex to Antibodies IGG & IGM Blot
This comprehensive test is the primary diagnostic tool for detecting Lyme disease, which is the underlying cause of Lyme carditis. The test first screens for Lyme antibodies and, if positive, automatically performs more specific IGG and IGM antibody testing to confirm the diagnosis. This is essential for identifying the bacterial infection affecting the heart tissue.
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Diagnosing Lyme Carditis
Lyme carditis occurs when Borrelia burgdorferi, the bacteria that causes Lyme disease, spreads to the heart tissue. Because the cardiac symptoms can mimic other heart conditions, confirming the presence of Lyme disease through blood testing is essential for proper diagnosis and treatment with appropriate antibiotics.
Understanding the Connection
While cardiac symptoms may be evaluated through physical examination and heart monitoring, blood testing for Lyme disease antibodies is crucial because it identifies the specific bacterial cause of the heart inflammation. Early detection and treatment of the underlying Lyme infection can help prevent progression of cardiac complications.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
