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Sympathoexcitation increases the QT/RR slope in healthy men: differential effects of hypoxia, dobutamine, and phenylephrine.

par Xhaet, Olivier ;Argacha, Jean-François ;Pathak, Atul ;Gujic, Marko;Houssiere, Anne ;Najem, Boutaina ;Degaute, Jean-Paul ;Van De Borne, Philippe
Référence Journal of cardiovascular electrophysiology, 19, 2, page (178-184)
Publication Publié, 2008-02

Article révisé par les pairs

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Résumé :

Dynamic ventricular repolarization assessed by QT/RR slopes studies the effects of modifications in cardiac repolarization independently of variations in RR interval (RR). The effects of changes in sympathetic and vagal activity on the QT/RR slope are controversial. We tested the hypothesis that sympathoexcitation is an important determinant of the QT/RR slope.