title: Antimitochondrial antibodies-positive myositis accompanied by cardiac involvement.
abstract: We report a 55-year-old man who experienced proximal muscle weakness accompanied by the atrial flutter (AFL) with 1:1 conduction. Detailed examination revealed elevated antimitochondrial antibodies (AMA) and creatine kinase (CK). AFL was converted to sinus rhythm by cardioversion. He was diagnosed as AMA-positive myositis-associated AFL and was treated by prednisolone. Although his muscle weakness and CK level improved, AFL with 1:1 conduction reappeared. Therefore, radiofrequency catheter ablation (RFCA) was needed to treat the AFL, resulting in maintenance of sinus rhythm. This case report describes cardiac involvement in a patient with AMA-positive myositis.
authors.affiliation: Tokyo Teishin Byoin, Chiyoda-ku, Japan.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Yamanaka
authors.affiliation: Tokyo Teishin Byoin, Chiyoda-ku, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Fukatsu
authors.affiliation: Tokyo Teishin Byoin, Chiyoda-ku, Japan.
authors.forename: Yoshimaro
authors.initials: Y
authors.lastname: Ichinohe
authors.affiliation: Tokyo Teishin Byoin, Chiyoda-ku, Japan.
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Hirata
mesh_terms: D001282:Atrial Flutter / Q000503:physiopathology / Q000628:therapy*; D017115:Catheter Ablation / Q000379:methods; D004554:Electric Countershock; D006801:Humans; D008297:Male; D008875:Middle Aged; D008928:Mitochondria / Q000276:immunology*; D009220:Myositis / Q000276:immunology*