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Sevoflurane in patients at risk of ventricular dysrhythmias
Sevoflurane in patients at risk of ventricular dysrhythmias
Beny Charbit 0
0 Reims University Hospital , Reims , France
QT interval; Sevoflurane; Propofol; Ventricular dysrhythmias
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To the Editor:
I read with interest the paper by Terao et al. [1] that did
not find QT prolongation in patients receiving propofol and
sevoflurane during induction of anesthesia. However, it is
probably more the consequence of low sevoflurane
concentrations during induction than a ‘counteract’ effect of
propofol on the electrophysiological effects of the volatile
agent as stated by the authors. In fact, all volatile agents,
including sevoflurane, prolong the QT interval due
principally due to the inhibition of IHERG at clinical
concentrations [2]. This inhibition of IHERG is involved in
druginduced torsades de pointes [3]. Propofol does not have an
inhibitory effect on IHERG [4]. Thus, it is pharmacologically
very improbable that propofol could counteract the cardiac
effects of sevoflurane. Even if sevoflurane appears to be at
a lesser risk than older volatile agents like isoflurane, it is
probably safer to avoid these agents in patients at risk of
ventricular dysrhythmias, contrary to the conclusions of
Terao et al. In these patients, propofol should be preferred,
without sevoflurane, for both induction and maintenance of
anesthesia [5], especially as the present work confirms the
good electrophysiological tolerance of propofol.
1. Terao Y , Higashijima U , Toyoda T , Ichinomiya T , Fukusaki M , Hara T. The effects of intravenous anesthetics on QT interval during anesthetic induction with sevoflurane . J Anesth . 2016 ; 30 : 929 - 34 .
2. Li J , Correa AM . Kinetic modulation of HERG potassium channels by the volatile anesthetic halothane . Anesthesiology . 2002 ; 97 : 921 - 30 .
3. Roden DM . Drug-induced prolongation of the QT interval . N Engl J Med . 2004 ; 350 : 1013 - 22 .
4. Yamada M , Hatakeyama N , Malykhina AP , Yamazaki M , Momose Y , Akbarali HI . The effects of sevoflurane and propofol on QT interval and heterologously expressed human ether-ago-go related gene currents in Xenopus oocytes . Anesth Analg . 2006 ; 102 : 98 - 103 .
5. Staikou C , Chondrogiannis K , Mani A. Perioperative management of hereditary arrhythmogenic syndromes . Br J Anaesth . 2012 ; 108 : 730 - 44 . (...truncated)