TY - JOUR
T1 - In vitro effects of desflurane, sevoflurane, isoflurane, and halothane in isolated human right atria
AU - Hanouz, J. L
AU - Massetti, Massimo
AU - Guesne, G
AU - Chanel, S
AU - Babatasi, G
AU - Rouet, R
AU - Ducouret, P
AU - Khayat, A
AU - Galateau, F
AU - Bricard, H
AU - Gérard, J. L.
PY - 2000
Y1 - 2000
N2 - BACKGROUND:
Direct myocardial effects of volatile anesthetics have been studied in various animal species in vitro. This study evaluated the effects of equianesthetic concentrations of desflurane, sevoflurane, isoflurane, and halothane on contractile parameters of isolated human atria in vitro.
METHODS:
Human right atrial trabeculae, obtained from patients undergoing coronary bypass surgery, were studied in an oxygenated (95% O2-5% CO2) Tyrode's modified solution ([Ca2+]o = 2.0 mM, 30 degrees C, stimulation frequency 0.5 Hz). The effects of equianesthetic concentrations (0.5, 1, 1.5, 2, and 2.5 minimum alveolar concentration [MAC]) of desflurane, sevoflurane, isoflurane, and halothane on inotropic and lusitropic parameters of isometric twitches were measured.
RESULTS:
Isoflurane, sevoflurane, and desflurane induced a moderate concentration-dependent decrease in active isometric force, which was significantly lower than that induced by halothane. In the presence of adrenoceptor blockade, the desflurane-induced decrease in peak of the positive force derivative and time to peak force became comparable to those induced by isoflurane. Halothane induced a concentration-dependent decrease in time to half-relaxation and a contraction-relaxation coupling parameter significantly greater than those induced by isoflurane, sevoflurane and desflurane.
CONCLUSIONS:
In isolated human atrial myocardium, desflurane, sevoflurane, and isoflurane induced a moderate concentration-dependent negative inotropic effect. The effect of desflurane on time to peak force and peak of the positive force derivative could be related to intramyocardial catecholamine release. At clinically relevant concentrations, desflurane, sevoflurane, and isoflurane did not modify isometric relaxation.
AB - BACKGROUND:
Direct myocardial effects of volatile anesthetics have been studied in various animal species in vitro. This study evaluated the effects of equianesthetic concentrations of desflurane, sevoflurane, isoflurane, and halothane on contractile parameters of isolated human atria in vitro.
METHODS:
Human right atrial trabeculae, obtained from patients undergoing coronary bypass surgery, were studied in an oxygenated (95% O2-5% CO2) Tyrode's modified solution ([Ca2+]o = 2.0 mM, 30 degrees C, stimulation frequency 0.5 Hz). The effects of equianesthetic concentrations (0.5, 1, 1.5, 2, and 2.5 minimum alveolar concentration [MAC]) of desflurane, sevoflurane, isoflurane, and halothane on inotropic and lusitropic parameters of isometric twitches were measured.
RESULTS:
Isoflurane, sevoflurane, and desflurane induced a moderate concentration-dependent decrease in active isometric force, which was significantly lower than that induced by halothane. In the presence of adrenoceptor blockade, the desflurane-induced decrease in peak of the positive force derivative and time to peak force became comparable to those induced by isoflurane. Halothane induced a concentration-dependent decrease in time to half-relaxation and a contraction-relaxation coupling parameter significantly greater than those induced by isoflurane, sevoflurane and desflurane.
CONCLUSIONS:
In isolated human atrial myocardium, desflurane, sevoflurane, and isoflurane induced a moderate concentration-dependent negative inotropic effect. The effect of desflurane on time to peak force and peak of the positive force derivative could be related to intramyocardial catecholamine release. At clinically relevant concentrations, desflurane, sevoflurane, and isoflurane did not modify isometric relaxation.
KW - Aged
KW - Anesthetics, Inhalation
KW - Catecholamines
KW - Halothane
KW - Heart Atria
KW - Humans
KW - Hydrocarbons, Halogenated
KW - Isoflurane
KW - Methyl Ethers
KW - Middle Aged
KW - Myocardial Contraction
KW - Aged
KW - Anesthetics, Inhalation
KW - Catecholamines
KW - Halothane
KW - Heart Atria
KW - Humans
KW - Hydrocarbons, Halogenated
KW - Isoflurane
KW - Methyl Ethers
KW - Middle Aged
KW - Myocardial Contraction
UR - http://hdl.handle.net/10807/103876
M3 - Article
SN - 0003-3022
VL - 92
SP - 116
EP - 124
JO - Anesthesiology
JF - Anesthesiology
ER -