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Updated: May 10, 2026

Implantation of Total Artificial Heart in Congenital Heart Disease
Published on: July 18, 2014
A young healthy male with syncope and complete heart block
V Chauhan1, N Chauhan, C G S Chauhan
1Department of Medicine, Drexel University College of Medicine & Hahnemann University Hospital, 245 N.15th Street, Philadelphia, PA 19102, USA.veeraish@yahoo.com
Insights
Heart block as the sole initial symptom of Lyme disease is uncommon. Prompt diagnosis and treatment with ceftriaxone can resolve Lyme carditis, avoiding unnecessary pacemaker implantation.
Area of Science:
- Cardiology
- Infectious Diseases
- Medical Diagnostics
Background:
- Lyme disease rarely presents solely with heart block (1% incidence).
- Isolated Lyme carditis poses diagnostic challenges due to lack of typical Lyme disease stigmata.
Observation:
- A patient experienced syncope due to fluctuating heart block without prior Lyme disease manifestations.
- Lyme carditis was suspected after excluding other common causes of heart block.
Findings:
- Positive Lyme disease serologies confirmed the diagnosis.
- The patient's heart block resolved completely following treatment with ceftriaxone.
Implications:
- Clinicians should consider Lyme carditis in at-risk individuals presenting with heart block to avoid invasive procedures like permanent pacemaker implantation.
- Early diagnosis and treatment of Lyme carditis prevent potential late-stage Lyme disease complications and reduce healthcare costs.
Introduction:
It is rare to see heart block as the first-and-only presentation of Lyme disease, the reported incidence being just 1% in untreated patients.
Case Presentation:
We report a patient who presented with syncope secondary to a fluctuating heart block. He had no previous manifestations of Lyme disease. Lyme carditis was suspected after the other usual etiologies of heart block were ruled out. Later, serologies came positive and patient's heart block resolved on ceftriaxone therapy.
Conclusion:
In at-risk individuals, clinicians should rule out this readily-treatable cause of heart block before proceeding with permanent pacemaker implantation due to enormous clinical and cost implications involved. Missing the diagnosis also exposes the patient to the risk of developing the late complications of Lyme disease. Diagnosis of isolated Lyme carditis is a challenge because the clinician does not have the diagnostic-clues that can usually be gleaned from the more common stigmata of Lyme disease.
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