Lyme disease is a tick-borne illness caused by the spirochete Borrelia
burgdorferi. It is the most common reported vector-borne illness in t
he United States. The clinical course of Lyme disease is divided into
early and late phases. Early disease may be limited or disseminated. G
enerally, cardiac complications occur in the early disseminated phase.
Disturbance of atrioventicular conduction is the most commonly recogn
ized cardiac manifestation of Lyme disease. This is usually self-limit
ed and does not require permanent cardiac pacing. A case of Lyme cardi
tis with atrioventricular block requiring permanent pacing is reported
and the indications for cardiac pacing in this disease are reviewed.