title: Sudden paradoxical QT-interval prolongation exacerbating T-wave alternans in a patient with type 3 long QT syndrome.
abstract: We report a case with type 3 congenital long QT syndrome, who exhibited a sudden paradoxical QT-interval prolongation during a progressive increase in heart rate, which exacerbated T-wave alternans.
authors.affiliation: Gifu University Hospital, Gifu, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Takasugi
authors.affiliation: Gifu Prefectural General Medical Center, Gifu, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Goto
authors.affiliation: Gifu Prefectural General Medical Center, Gifu, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kuwahara
authors.affiliation: Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, MA.
authors.forename: Richard L
authors.initials: RL
authors.lastname: Verrier
mesh_terms: D000075224:Cardiac Conduction System Disease; D002648:Child; D017147:Defibrillators, Implantable; D004562:Electrocardiography; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008133:Long QT Syndrome / Q000503:physiopathology* / Q000628:therapy; D008297:Male
keywords: QT interval; RR interval; T-wave alternans; congenital long QT syndrome