RT Journal A1 Kimball SA, Janson PA, LaRaia PJ T1 COmplete heart block as the sole presentation of lyme disease JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1989 FD August 1 VO 149 IS 8 SP 1897 OP 1898 DO 10.1001/archinte.1989.00390080141032 UL http://dx.doi.org/10.1001/archinte.1989.00390080141032 AB • We report a case of Lyme myocarditis presenting solely as complete heart block in a previously healthy 32-year-old white man. Indium cardiac antimyosin scan showed diffuse uptake (2 +, on a scale of 0 to 4+) during the acute phase of the illness. The electrocardiogram and the indium cardiac antimyosin scan were normal 6 weeks after completion of tetracycline and prednisone treatment. Lyme carditis should be considered in the differential diagnosis of complete heart block of unclear origins, even in patients presenting without other signs or symptoms suggestive of Lyme disease.(Arch Intern Med. 1989:149:1897-1898)