title: The effects of intravenous anesthetics on QT interval during anesthetic induction with sevoflurane.
abstract: Sevoflurane is known to prolong the QT interval. This study aimed to determine the effect of the interaction between intravenous anesthetics and sevoflurane on the QT interval.
  
  
  
  The study included 48 patients who underwent lumbar spine surgery. Patients received 3 μg/kg fentanyl and were then randomly allocated to either Group T, in which they received 5 mg/kg thiamylal, or Group P, in which they received 1.5 mg/kg propofol, at 2 min after administration of fentanyl injection for anesthetic induction. Vecuronium (1.5 mg/kg) and sevoflurane (3 % inhaled concentration) were administered immediately after loss of consciousness and tracheal intubation was performed 3 min after vecuronium injection. Heart rate (HR), mean arterial pressure (MAP), bispectral index score (BIS), and the heart rate-corrected QT (QTc) interval on a 12-lead electrocardiogram were recorded immediately before fentanyl administration (T1), 2 min after fentanyl injection (T2), immediately before intubation (T3), and 2 min after intubation (T4).
  
  
  
  There were no significant differences between the two groups in baseline patient characteristics. BIS and MAP significantly decreased after anesthesia induction in both groups. At T3, MAP in Group T was higher than in Group P, while HR had reduced in both groups. The QTc interval was prolonged after anesthesia induction in Group T, but did not change at any time point in Group P. The QTc interval after anesthesia induction in Group T was longer than in Group P.
  
  
  
  We concluded that an injection of propofol could counteract QTc interval prolongation associated with sevoflurane anesthesia induction.
authors.affiliation: Department of Anesthesia, Nagasaki Rosai Hospital, 2-12-5 Setogoe, Sasebo, 857-0134, Japan. yoterao@na-robyo.jp.
authors.forename: Yoshiaki
authors.identifier: 0000-0001-5812-0775
authors.initials: Y
authors.lastname: Terao
authors.affiliation: Department of Anesthesia, Nagasaki Rosai Hospital, 2-12-5 Setogoe, Sasebo, 857-0134, Japan.
authors.forename: Ushio
authors.initials: U
authors.lastname: Higashijima
authors.affiliation: Department of Anesthesia, Nagasaki Rosai Hospital, 2-12-5 Setogoe, Sasebo, 857-0134, Japan.
authors.forename: Tomomi
authors.initials: T
authors.lastname: Toyoda
authors.affiliation: Department of Anesthesia, Nagasaki Rosai Hospital, 2-12-5 Setogoe, Sasebo, 857-0134, Japan.
authors.forename: Taiga
authors.initials: T
authors.lastname: Ichinomiya
authors.affiliation: Department of Anesthesia, Nagasaki Rosai Hospital, 2-12-5 Setogoe, Sasebo, 857-0134, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Fukusaki
authors.affiliation: Department of Anesthesiology, Nagasaki University School of Medicine, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Hara
mesh_terms: D000328:Adult; D000368:Aged; D018686:Anesthetics, Intravenous / Q000008:administration & dosage* / Q000494:pharmacology; D062186:Arterial Pressure / Q000187:drug effects; D004562:Electrocardiography / Q000187:drug effects; D005260:Female; D005283:Fentanyl / Q000008:administration & dosage; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007442:Intubation, Intratracheal; D008297:Male; D008738:Methyl Ethers / Q000008:administration & dosage*; D008875:Middle Aged; D015742:Propofol / Q000008:administration & dosage*; D000077149:Sevoflurane; D014673:Vecuronium Bromide / Q000008:administration & dosage* / Q000494:pharmacology
chemical_list: D018686:Anesthetics, Intravenous; D008738:Methyl Ethers; D000077149:Sevoflurane; D014673:Vecuronium Bromide; D005283:Fentanyl; D015742:Propofol
keywords: Dysrhythmias; Propofol; QT dispersion; QT interval; Sevoflurane; Thiamylal