title: Electrocardiographic patterns in posterior chest leads (V7, V8, V9) in normal subjects.
abstract: The electrocardiographic patterns in leads V7, V8, and V9 were studied in 225 young, normal men (age range 17 to 21 years). The prevalence of 0.5- to 1.0-mm ST-segment elevation in leads V7, V8, and Vg 0.08 second after the J point was 8.9%, 5.8%, and 3.1%, respectively; the ST-segment elevation was not >1.0 mm in any subject.
authors.affiliation: Cardiac Department, National University Hospital, Singapore.
authors.forename: B L
authors.initials: BL
authors.lastname: Chia
authors.forename: H C
authors.initials: HC
authors.lastname: Tan
authors.forename: J W
authors.initials: JW
authors.lastname: Yip
authors.forename: T L
authors.initials: TL
authors.lastname: Ang
mesh_terms: D000293:Adolescent; D000328:Adult; D004562:Electrocardiography / Q000379:methods; D004566:Electrodes; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D008889:Military Personnel; D044469:Racial Groups; D012016:Reference Values; D012846:Singapore; D016683:Supine Position; D013909:Thorax