title: Measurement of QT interval.
authors.forename: M
authors.initials: M
authors.lastname: Mäntysaari
authors.forename: J
authors.initials: J
authors.lastname: Karjalainen
authors.forename: M
authors.initials: M
authors.lastname: Viitasalo
mesh_terms: D000328:Adult; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged