Lyme Carditis in Children Is Rising—and It’s More Than Heart Block
Cases are increasing
Heart involvement is broader
Costs are significantly higher
Early recognition matters
Lyme carditis in children is increasing across the United States. A national study highlights not only rising case numbers—but a broader range of cardiac complications than previously recognized.
In their article, “Increasing Burden of Lyme Carditis in United States Children’s Hospitals”, Beach and colleagues report significant growth in pediatric Lyme carditis cases, particularly in the Midwest and Ohio Valley.
Who Is Affected?
Children with Lyme carditis differed from those with Lyme disease alone:
- Average age: 13 years
- More likely to be male
A key pattern is demographic clustering. Older children and adolescent males appear at higher risk.
The Cost of Lyme Carditis
Lyme carditis carries a significantly higher healthcare burden:
- Median cost with carditis: $9,104 (range $3,741–$19,003)
- Median cost without carditis: $922 (range $238–$4,987)
A key pattern is escalation. Cardiac involvement dramatically increases the cost of care.
These figures do not include indirect costs such as missed school, caregiver burden, or long-term complications.
More Than Just Heart Block
While Lyme carditis is often associated with AV block, this study revealed a much broader spectrum of cardiac involvement.
A key pattern is variability. Lyme disease can affect the heart in multiple ways.
Cardiac Findings in 189 Children
- First-degree AV block – 28%
- Acute myocarditis – 27%
- Complete AV block – 17%
- Second-degree AV block – 15%
- Heart disease (unspecified) – 9%
- Non-specific ECG abnormalities – 4%
- Cardiomyopathy – 4%
- Premature beats – 3%
- Right bundle branch block – 3%
- Acute pericarditis – 2%
- Atrial fibrillation/flutter – 2%
- Cardiac arrest – 2%
- Congestive heart failure – 2%
- Other dysrhythmias – 38%
This range extends far beyond traditional surveillance definitions.
Important Limitations
The authors noted several limitations:
- Cardiac coding accuracy could not be confirmed
- Pre-existing cardiac conditions may not have been fully excluded
- Out-of-hospital outcomes were not available
Despite these limitations, the findings highlight a concerning trend.
No Reported Deaths—But Important Gaps
None of the 189 children died during hospitalization.
However, long-term outcomes were not captured.
This leaves unanswered questions about recovery and long-term cardiac effects.
Why This Matters
The authors emphasize that the rising burden of Lyme carditis reflects a need for:
- Earlier recognition of Lyme disease
- Improved diagnostic awareness
- Better prevention strategies
Delayed diagnosis may increase the risk of serious cardiac complications.
Learn more about delayed Lyme disease diagnosis.
Clinical Takeaway
Lyme carditis in children is increasing and may present in many different forms—not just heart block.
Recognizing the broader spectrum of cardiac involvement is critical to avoiding delayed diagnosis and reducing complications.
Related Reading
- Lyme carditis with atrial fibrillation
- Lyme carditis diagnosis delays
- Severe cardiac case in teenager
Reference
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
