Key result
Intravenous ceftriaxone successfully treated early disseminated Lyme carditis, leading to the resolution of high-degree atrioventricular block by hospital day four.
Case Report (n=1)
Early identification and treatment of Lyme carditis with intravenous antibiotics can rapidly resolve high-degree AV block without sequelae.
Lyme carditis should be considered in young patients with AV block and rash; single case leaves open need for prospective data.
infection. This case demonstrates a 20-year-old male patient presenting with complaints of annular skin rash, malaise, fever, and lightheadedness after significant outdoor exposure. Physical exam revealed multiple large targetoid lesions on the back and extremities. The rash had raised borders and centralized clearing consistent with erythema migrans chronicum. Electrocardiogram (ECG) revealed a high-degree atrioventricular (AV) block. The patient was started on intravenous ceftriaxone due to clinical suspicion for Lyme carditis. ELISA and Western blot tests were reactive for Lyme IgM and IgG, confirming the diagnosis. The AV block resolved by hospital day four and the patient was discharged with outpatient follow-up. Early identification of disease allowed for effective treatment with no adverse outcomes or sequelae.
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Kerndt et al. (2020) conducted a case report in Lyme carditis (n=1). Intravenous ceftriaxone was evaluated on Resolution of AV block. Intravenous ceftriaxone successfully treated early disseminated Lyme carditis, leading to the resolution of high-degree atrioventricular block by hospital day four.
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