HigginbothamL.SotoA.V.ingentaconnectEuropace LondonW. Whang, H.M. Julien, L. Higginbotham, A.V. Soto, N. Broodie, J.T. Bigger, et al., Women, but not men, have prolonged QT interval if depressed after an acute coro- nary syndrome, Europace 14 (2012) 257-271....
Objectives: To evaluate the degree of QT dispersion in a group of young women in the starvation phase of anorexia nervosa (AN) and its relation to left ventricular (LV) mass. Study design: Sixteen patients with self-induced starvation were matched with 16 women of normal weight and 16 consti...
The mean RR interval was 0.81 second (range 0.5 to 1.47) heart rate 74 beats/min (range 41 to 120), and mean QT was 0.35 second (range 0.24 to 0.49) in men and 0.36 second (range 0.26 to 0.48) In women. The linear regression model yielded a correction formula (for a reference RR...
Heart rate-corrected QT interval prolongation predicts risk of coronary heart disease in black and white middle- aged men and women: the ARIC study. J Am Coll Cardiol 2004; 43: 565–571. 4 Robbins J, Nelson JC, Rautaharju PM, Gottdiener JS. The association between the length of the QT...
In addition, this study was performed in a single city in the United States; rates of QTPM use, illicit drug use, and intensity of QT interval monitoring may differ geographically, and thus results may not be generalizable to all populations. However, the rate of overdose sudden deaths in ...
If I understand correctly, QTc intervals of less than 440 ms are considered to be normal, whereas QTc intervals of 440 ms to 460 ms in men and 440 ms to 470 ms in women are considered borderline. A couple of days ago I had an ECG. My QT/QTc was 412/447 ms at a heart rate of...
range) on standard ECGs or in patients with a score of 2-3 based on the 1993 Schwartz et al diagnostic criteria, an analysis of the dynamic behavior of QTc duration during exercise ECG or long-term Holter monitoring may reveal maladaptation of the QT interval to a changing heart ...
QT interval is the time from the start of the Q wave to the end of the T wave, time taken for ventricular depolarisation and repolarisation
There is a pathogenic mutation in one of the LQTS genes (the authors note that 20% to 25% of these patients may have a QTc in the normal range). QTc interval is 500 ms or greater on repeated 12-lead ECGs, and there is no secondary cause of QT prolongation; or QTc is between...
The RR bin method of controlling for heart rate involves distributing QT values according to their preceding RR interval into "bins" encompassing a predefined range (73). For example, the QT1000, determined from the 995- to 1004-ms RR bin, is an estimate of the QT interval at 60 beats ...