Overall, QTc interval changes remained within normal limits (fixed at 470 msec in women), without the occurrence of any cardiac adverse events, especially severe arrhythmias such as torsades-de-pointes. Our findings suggest that the co-administration of these treatments might be safe, at least ...
were evaluated in 32 women with syndrome X (exertional chest pain, positive exercise testing, and completely normal coronary arteries) and 34 normal controls.Results: Patients with syndrome X had significantly longer QTc interval (440 ± 24 ms) than normal subjects (410 ± 26 ms, p<0.004). ...
QTCQ-T Corrected(corrected Q-T interval) QTCQueensland Turf Club(Australia) QTCQuality Training Center(various organizations) QTCQuester Tangent Corporation(North Saanich, British Columbia, Canada) QTCQuality Tourism for the Caribbean QTCQueensland Theological College(Brisbane, QLD, Australia) ...
The means of CRP level in women, though over normal range, increased significantly as QTc interval was longer, independent of confounding factors, while those of men were on the borderline of significance. However, compared to normal range of QTc interval, prolonged QTc interval was associated ...
Several formulae, the Bazett, Fridericia, Framingham and Hodges formulae, correct QT (QTc) for heart rate variability and an interval of 4450 ms for men and 460 ms for women is generally accepted as upper limit of normal (Bazett, 1920; Fridericia, 1920; Hodges et al, 1983; Sagie et al...
An abnormally prolonged QTc interval (>450 ms in men, >470 ms in women) was associated with a three-fold increased risk of sudden cardiac death (hazard ratio, 2.5; 95% confidence interval, 1.3 to 4.7), after adjustment for age, gender, body mass index, hypertension, cholesterol/high-...
DESIGN: Cross-sectional evaluation of the Qtc interval in three groups of premenopausal women during rest and two exercise conditions (50% VO2 max and VO2 max). SUBJECTS: Thirty-one healthy women with a mean age of 35 y (27-44 y) were classified as either obese (n = 22; percent ...
There is normal physiological variation in the QTc interval. QT can vary with gender, time of day, food intake, alcohol intake, menstrual cycle, ECG lead placement Plasma levels can also change QTc prolongation is most prominent at peak drug plasma levels and least obvious at trough levels.QT...
A PVC during this period, or prolonging of this period, can take an otherwise structurally normal heart and stop it in an instant. I always knew the prognostic power of the QTc, but that day, I think I truly appreciated how important this interval is and how it can literally ...
Since QT varies with heart rate, QT and RR intervals were measured in three normal sequent complexes in each lead to reduce measurement error. The QT interval was measured from the beginning of the QRS complex to the end of the T-wave. Heart rate correction was performed by the Bazett's ...