We describe a case of a previously healthy adolescent who presented with junctional tachycardia and complete atrioventricular (AV) block due to Lyme carditis. The simultaneous presence of these findings suggested significant inflammation of the AV junction. Junctional tachycardia, particularly if seen in a patient with conduction abnormalities and potential tick exposure, should increase suspicion for Lyme carditis.
Keywords: Atrioventricular block; Junctional tachycardia; Lyme carditis; Lyme disease.
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