Intra-hisian 2:1 AV block secondary to Lyme carditis can be successfully treated and reversed with i.v. ceftriaxone.
May support ceftriaxone for Lyme carditis AV block; single case leaves open need for prospective validation.
We describe a case of Lyme carditis with intra-hisian 2:1 atrioventricular (AV) block documented by electrophysiological study. To our knowledge, only two cases of AV block at the level of the His bundle has been described in the literature. Sinus rhythm was restored after 4 days of i.v. ceftriaxone.
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Zimmermann et al. (1991) studied this question.
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