Background:In the general population, the normal value of the corrected QT (QTc) interval for women is under 450 ms, which is longer than that of men (under 430 ms). There have been reported several sex differences in characteristics of takotsubo syndrome (TTS). Prolonged QTc interval is ...
Background:In the general population, the normal value of the corrected QT (QTc) interval for women is under 450 ms, which is longer than that of men (under 430 ms). There have been reported several sex differences in characteristics of takotsubo syndrome (TTS). Prolonged QTc interval is ...
Results: LV-chamber mass was significantly less in women with AN than in thin and normal-weight women. QT dispersion was significantly greater in AN than in the thin and control groups (QT dispersion: 50 ± 14 vs 34 ± 9 and 37 ± 11 ms, P <.001; QT interval dispersion corrected ...
Corrected QT interval (QTc): The QT interval has an inverse relationship with heart rate. The QTc is the QT interval corrected for heart rate, and it estimates the QT interval at a heart rate of 60 beats/min. See formulas. Prolonged QTc is generally defined as >450 ms for adult males ...
Endogenous testosterone and progesterone shorten the action potential, and estrogen lengthens the QT interval. During a single menstrual cycle, progesterone levels, but not estrogen levels, have the dominant effect on ventricular repolarization in women. Studies of menopausal hormone therapy (MHT) in ...
Of the many formulas proposed to describe this relation, the most widely used formula for correcting the rate is that of Bazett, in which QTc=kRR the k value,48 as modified by Shipley and Hallaran,49 is 0.397 for men and 0.415 for women. It has been suggested that the QTc interval ...
The aim of the study was to investigate whether cardiac amyloidosis is associated with QT interval abnormalities and ventricular arrhythmias. A controlled study of 30 patients was undertaken at a university cardiology department in a large referral hospital. Thirty patients (18 men, 12 women, mean ...
4、en and 56 normal women.Results:QT interval became shorter as the heart rate increased.The two variables manifested a negative linear relation.For man,the values were -1.38±0.30 for the slope of regression equation;462±37 ms for the intercept;and -0.96±0.03 for the correlation coeffici ...
Between May 2014 and July 2016, 412 patients >18 years-old consecutively admitted to the ICU of a university hospital were included. LQTS was defined as a QT interval on the admission electrocardiogram corrected using Bazett's formula (QTc) >460 ms for men and >470 ms for women. All ...
We attempted to evaluate whether subjects who exhibit prolonged corrected QT (QTc) interval (≥440 ms in men and ≥460 ms in women) on ECG, with and without ECG-diagnosed left ventricular hypertrophy (ECG-LVH; Cornell product, ≥244 mV×ms), are at increased risk of stroke. Among the 10...