title: Variations of the ST segment in the rat electrocardiogram.
abstract: The characteristics of the electrocardiogram were studied by an oscilloscope method in 30 male albino rats anesthetized with methyleugenol. The results indicated that the measured QT interval remained constant despite the fall in heart rate. The ST segment was present in 50% of the animals, representing approximately 10% of the whole QT interval duration. The use of Bazzet's formula (QTc = k square root of R-R) to correct the measured QT interval for changes in heart rate revealed that 0.17 is a better choice for k in anesthetized adult rats.
authors.affiliation: Departamento de Fisiologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brasil.
authors.forename: A A
authors.initials: AA
authors.lastname: Menezes
authors.forename: A B
authors.initials: AB
authors.lastname: Silva
authors.forename: M F
authors.initials: MF
authors.lastname: Ximenes
authors.forename: M B
authors.initials: MB
authors.lastname: Sousa
mesh_terms: D000777:Anesthetics / Q000494:pharmacology*; D000818:Animals; D004562:Electrocardiography / Q000379:methods; D005054:Eugenol / Q000031:analogs & derivatives* / Q000494:pharmacology; D006339:Heart Rate / Q000187:drug effects*; D008297:Male; D051381:Rats
chemical_list: D000777:Anesthetics; C005223:methyleugenol; D005054:Eugenol