Sex differences in drug-induced changes in ventricular repolarization

Vicente, J. ; Johannesen, L. ; Mason, J. W. ; Pueyo, E. (Universidad de Zaragoza) ; Stockbridge, N. ; Strauss, D. G.

Resumen: Introduction: Heart rate corrected QT (QTc) interval prolongation is a predictor of drug-induced torsade de pointes, a potentially fatal ventricular arrhythmia that disproportionately affects women. This study assesses whether there are sex differences in the ECG changes induced by four different hERG potassium channel blocking drugs.
Methods and results: Twenty-two healthy subjects (11 women) received a single oral dose of dofetilide, quinidine, ranolazine, verapamil and placebo in a double-blind 5-period crossover study. ECGs and plasma drug concentrations were obtained at pre-dose and at 15 time-points post-dose. Dofetilide, quinidine and ranolazine prolonged QTc. There were no sex differences in QTc prolongation for any drug, after accounting for differences in exposure. Sex differences in any ECG biomarker were observed only with dofetilide, which caused greater J-Tpeakc prolongation (p=0.045) but lesser Tpeak-Tend prolongation (p=0.006) and lesser decrease of T wave amplitude (p=0.003) in women compared to men.
Conclusions: There were no sex differences in QTc prolongation for any of the studied drugs. Moreover, no systematic sex differences in other drug-induced ECG biomarker changes were observed in this study. This study suggests that the higher torsade risk in women compared to men is not due to a larger concentration-dependent QTc prolongation.

Idioma: Inglés

DOI: 10.1016/j.jelectrocard.2015.08.004

Año: 2015

Publicado en: JOURNAL OF ELECTROCARDIOLOGY 48, 6 (2015), 1081-1087
ISSN: 0022-0736

Factor impacto JCR: 1.29 (2015)

Categ. JCR: CARDIAC & CARDIOVASCULAR SYSTEMS rank: 93 / 124 = 0.75 (2015) - Q3 - T3

Factor impacto SCIMAGO: 0.559 - Cardiology and Cardiovascular Medicine (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/FSE
Financiación: info:eu-repo/grantAgreement/ES/DGA/Grupo Consolidado BSICoS
Financiación: info:eu-repo/grantAgreement/ES/MINECO/TIN2013-41998-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Teoría Señal y Comunicac. (Dpto. Ingeniería Electrón.Com.)