Abstract：
:Clinical and experimental studies have shown that gender differences exist in cardiac repolarization in various animal species and human, as is evidenced by significantly longer QT, JT intervals and action potential duration in females than in males due to a reduced repolarization reserve in females. The latter is shown by the relatively greater increase in ventricular repolarization and higher incidence of torsades de pointes (TdP) in preparations from females by drugs blocking repolarizing K(+) currents. These results can be modulated by gonadectomy, suggesting that gonadal steroids are important determinants of gender difference in repolarization. In human subjects, QT and JT intervals are longer in women, whereas QT dispersion and Tp-e interval (the interval from the peak to the end of T wave) are longer in men. At slow heart rates greater prolongation in QT and increase in transmural repolarization heterogeneity (i.e. increase in Tp-e) may predispose to TdP tachycardias in women. In healthy postmenopausal women, hormone replacement therapy with estrogen alone usually produced a prolongation of QT interval, while estrogen plus progesterone had no significant effects on QT interval but reduced QT dispersion. Along with these, there are still conflicting data reported. Further work is needed before the elucidation of the basis of gender differences in ventricular repolarization.
journal_name
Fundam Clin Pharmacoljournal_title
Fundamental & clinical pharmacologyauthors
Cheng Jdoi
10.1111/j.1472-8206.2005.00384.xsubject
Has Abstractpub_date
2006-02-01 00:00:00pages
1-8issue
1eissn
0767-3981issn
1472-8206pii
FCP384journal_volume
20pub_type
杂志文章,评审abstract：:The aim of this study was to investigate biochemical and antioxidant parameters in alloxan-resistant (ALR) and alloxan-susceptible (ALS) rats. Diabetes was induced in 60-day-old male Wistar rats by a single intraperitonial injection of alloxan (AL, 150 mg/kg). Ten days after induction, a group of rats showed a signifi...
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journal_title：Fundamental & clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
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journal_title：Fundamental & clinical pharmacology
pub_type： 杂志文章
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pub_type： 临床试验,杂志文章,随机对照试验
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journal_title：Fundamental & clinical pharmacology
pub_type： 杂志文章,评审
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journal_title：Fundamental & clinical pharmacology
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