title: [Determination of plasma concentration of amiodarone and desethylamiodarone with high pressure liquid chromatography. Preliminary experience].
abstract: A simple specific and sensitive high pressure liquid chromatography method (HPLC) to measure amiodarone and desethylamiodarone is described. The plasma sample is deproteinized with acetonitrile and a 50 ul aliquote run in the HPLC system with reverse phase column (C-18). Methanol-ammonium hydroxide is used to separate and spectrophotometric measurements are read at 254 nm.95% of the drug present in plasma is extracted with this method, with a sensitivity of 0.03 ug/ml and a day to day variation under 3%. Preliminary measurements were analyzed in 14 subjects receiving amiodarone for treatment of supraventricular arrhythmia. With a mean dose of 267 +/- 116 (SD) mg/day, plasma levels of 1.3 +/- 0.6 ug.ml for amiodarone and 0.9 +/- 0.5 mg/ml for desethylamiodarone were obtained.
authors.affiliation: Departamento de Bioquímica y Química, Facultad de Medicina, Universidad de Chile, Santiago.
authors.forename: I
authors.initials: I
authors.lastname: Saavedra
authors.forename: M
authors.initials: M
authors.lastname: Ortiz
authors.forename: L
authors.initials: L
authors.lastname: Gaete
authors.forename: R
authors.initials: R
authors.lastname: Asenjo
authors.forename: L
authors.initials: L
authors.lastname: Biagini
mesh_terms: D000328:Adult; D000368:Aged; D000638:Amiodarone / Q000031:analogs & derivatives* / Q000097:blood*; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity
chemical_list: C036116:desethylamiodarone; D000638:Amiodarone
vernacular_title: Determinaciones plasmáticas de amiodarona y desetilamiodarona por cromatografía líquida de alta presión. Experiencia preliminar.