title: Relationship between infarction location and size to QT dispersion in patients with chronic myocardial infarction.
abstract: The relationship between the location and size of an infarction and QT dispersion was investigated in 84 Japanese patients with chronic myocardial infarction (54 with anteroseptal infarction and 30 with inferior infarction). The control group consisted of 23 subjects without ischemic heart disease (13 normal subjects and 10 hypertensive patients). Corrected QT dispersion (maximum corrected QT interval minus minimum corrected QT interval: QTc dispersion), was significantly larger in the anterior infarction group than in the control group (69.9+/-21.5 msec vs 53.0+/-17.6 msec), while the inferior infarction group showed no significant difference from control subjects. QTc dispersion was significantly greater in the patients with large anterior infarcts than in those with small anterior infarcts (80.5+/-20.5 msec vs 61.9+/-18.8 msec). In patients with chronic myocardial infarction, QT dispersion is influenced by the infarct location and size. Accordingly, interpretation of QT dispersion data should take these factors into consideration.
authors.affiliation: Department of Cardiology, Yokohama City Seibu Hospital, St. Marianna University School of Medicine, Kanagawa, Japan.
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Hashimoto
authors.forename: Haruki
authors.initials: H
authors.lastname: Musha
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ozawa
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Imai
authors.forename: Kensuke
authors.initials: K
authors.lastname: Kawasaki
authors.forename: Osamu
authors.initials: O
authors.lastname: Miyazu
authors.forename: Junzo
authors.initials: J
authors.lastname: Nagashima
authors.forename: Takehiko
authors.initials: T
authors.lastname: So
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Miyake
authors.forename: Masahiro
authors.initials: M
authors.lastname: Murayama
mesh_terms: D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000473:pathology* / Q000503:physiopathology*; D009206:Myocardium / Q000473:pathology; D013997:Time Factors