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Enhancement by propofol of epinephrine-induced arrhythmias in dogs
- Source :
- Anesthesiology. 75(6)
- Publication Year :
- 1991
-
Abstract
- Although propofol is a widely used intravenous anesthetic, its effect on epinephrine-induced arrhythmias remains unknown. This study examined the possible interaction between propofol and epinephrine that might affect the induction of ventricular arrhythmias in dogs. The arrhythmogenic threshold of epinephrine was determined during anesthesia with halothane alone, propofol alone, etomidate alone, or etomidate plus varying doses of propofol. The arrhythmogenic dose and the corresponding plasma concentration of epinephrine during propofol anesthesia (blood propofol concentration 18.0 +/- 0.98 micrograms/ml) were 2.52 +/- 0.43 micrograms.kg-1.min-1 and 23.6 +/- 8.5 ng/ml, respectively. During halothane anesthesia (end-tidal 1.3 MAC), they were 2.66 +/- 0.21 micrograms.kg-1.min-1 and 35.7 +/- 1.9 ng/ml, respectively. During etomidate anesthesia, they were 9.67 +/- 1.06 micrograms.kg-1.min-1 and 205 +/- 27.5 ng/ml, respectively. The dose-effect relationship for propofol was examined during etomidate plus propofol anesthesia. Propofol reduced the arrhythmogenic plasma concentration of epinephrine in a concentration-dependent manner: at blood propofol concentrations of 2.33 +/- 0.46, 5.46 +/- 0.71, and 11.2 +/- 0.81 micrograms/ml, the corresponding plasma epinephrine concentrations were 182.6 +/- 52.5, 89.0 +/- 28.8, and 26.6 +/- 6.9 ng/ml, respectively. These results suggest that propofol enhances epinephrine-induced arrhythmias in a dose-dependent manner in dogs.
- Subjects :
- Male
Epinephrine
Halothane anesthesia
Dogs
Etomidate
medicine
Animals
Anesthesia
Propofol
Dose-Response Relationship, Drug
business.industry
Arrhythmias, Cardiac
Drug Synergism
Anesthesiology and Pain Medicine
Plasma concentration
Anesthetic
Female
Plasma epinephrine
Halothane
business
medicine.drug
Subjects
Details
- ISSN :
- 00033022
- Volume :
- 75
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Anesthesiology
- Accession number :
- edsair.doi.dedup.....0d958c8508974f1c5f8efe5c203617ed