Lyme Carditis: An Infectious Cause of Atrioventricular Block – A Case Report

Introduction

Lyme disease (LD) is the most common tick-borne illness in the United States, caused by the spirochete Borrelia burgdorferi. The most common presentation is the erythema migrans skin rash, observed in over 90% of cases during the early localized stage.^, Weeks to months post-tick bite, the disease may progress to extracutaneous manifestations in the early disseminated phase, leading to cardiac, neurologic, and joint symptoms.^,

Lyme carditis (LC) is a rare complication of LD, occurring in 0.3% to 4% of untreated adults.^, The most prominent manifestations are conduction system disturbances involving the atrioventricular (AV) node, often presenting as high-degree AV block (AVB).

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