Circadian profile related to diurnal pattern of malignant ventricular arrhythmia.

2003 MAY 26 - (NewsRx.com & NewsRx.net) -- Circadian profile is related to reported diurnal pattern of malignant ventricular arrhythmias.

"The limited prognostic value of QT dispersion has been demonstrated in recent studies. However, longitudinal data on physiological variations of QT interval and the influence of aging and sex are, few.

"This analysis included 172 healthy subjects (89 women, 83 men; mean age 38.7 [+ or -] 15 years)," scientists in Germany report.

"Beat-to-beat QT interval duration QT, QTapex [QTa], T-end [Te]), variability (QTSD, QTaSD), and the mean R-R interval were determined from 24-hour ambulatory electrocardiograms after …