Cited 0 times in

Heart rate variability predicts the extent of corrected QT interval prolongation after tracheal intubation

Authors
 Ji Young Kim ; Yon Hee Shim ; Dong Woo Han ; Sung Yeon Ham ; Seung Ho Choi 
Citation
 Anesthesia and Pain Medicine (대한산과마취학회지), Vol.7(1) : 45~50, 2012 
Journal Title
 Anesthesia and Pain Medicine (대한산과마취학회지) 
ISSN
 1975-5171 
Issue Date
2012
Abstract
Background:Corrected QT (QTc) interval can be modulated by sympathetic and parasympathetic balance. Tracheal intubation causes significant prolongation of the QTc interval due to sympathetic stimulation. This study was designed to elucidate the relationship between baseline autonomic nervous system activity and QTc prolongation after endotracheal intubation using heart rate variability (HRV). Methods: Sixty-six healthy patients were included and the baseline HRV data were recorded for 5 min before anesthesia. Power spectrum densities were calculated for low frequencies (LF, 0.04−0.15 Hz) and high frequencies (HF, 0.15−0.4 Hz), defined as either LF's or HF's relative part of the total power. Anesthesia was induced with sevoflurane and vecuronium was given. The QTc interval, heart rate (HR) and mean arterial pressure (MAP) were measured before induction (baseline), before laryngoscopy (pre-intubation) and immediately after the intubation (post-intubation). Results: The QTc interval change at post-intubation from baseline (ԤQTc) showed a significant negative correlation with the HF (r = 0.34, P = 0.006) and positive correlation with LF/HF ratio (r = 0.37, P = 0.005). Patients were retrospectively divided into low-HF/ LF (<2.5, n = 44) and high-HF/LF group (>2.5, n = 22). The ԤQTc was statistically higher in the high-LF/HF group compared to that in the low-LF/HF group (P = 0.048). The HR and MAP at baseline, pre-intubation and post-intubation were not different between two groups. Conclusions: The QTc interval prolongation after endotracheal intubation is influenced by baseline autonomic conditions and can be exaggerated in patients with activated sympathetic activity or depressed parasympathetic activity.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/89475
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Anesthesiology and Pain Medicine
Yonsei Authors
사서에게 알리기
  feedback
Files in This Item:
T201205648.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse