title: Myocarditis mimicking acute coronary syndrome following influenza B virus infection: a case report.
abstract: We present a notable case of a 15-year-old male infected with influenza B virus who showed the clinical manifestations of myocardial ischemia. He was admitted to our hospital with sudden chest pain. He had febrile illness for the past 2 days. Rapid antigen test for influenza revealed positive influenza B virus antigen. The initial electrocardiogram showed elevation of the ST-segments in leads II, II, aVF and reciprocal depression in leads V1 and V2. Serum test showed elevation of creatine kinase and troponin T. Gadlinium-enchanced magnetic resonance imaging, Tl-201 and I-123 beta-methyl-p-iodephenyl-pentadecanoic acid scintigram, coronary angiography revealed no abnormality. Follow-up electrocardiogram showed ST-segment change improvement over the course. Myocarditis associated with influenza B virus seemed to be caused by endothelial impairment and disturbance of microcirculation rather than direct injury to cardiac myocytes.
authors.affiliation: Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University Japan. mune@pediatr.med.kyushu-u.ac.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Muneuchi
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kanaya
authors.forename: Tomoko
authors.initials: T
authors.lastname: Takimoto
authors.forename: Takayuki
authors.initials: T
authors.lastname: Hoshina
authors.forename: Koichi
authors.initials: K
authors.lastname: Kusuhara
authors.forename: Toshiro
authors.initials: T
authors.lastname: Hara