QT Dispersion - CHEST
QT dispersion is measured as the difference between the maximal and minimal QT intervals. 6,9,10 While the definition is straightforward, its accurate measurement becomes quite complex. First determining the end of the T wave can often be difficult, particularly if the T wave is of relatively low amplitude.
QT dispersion in medicine: electrophysiological Holy Grail or …
2000年7月1日 · QT dispersion is simply defined as the difference between the longest (QTmax) and the shortest (QTmin) QT intervals within a 12‐lead ECG. As far as possible, each of the twelve QT intervals should be individually measured …
QT Dispersion - an overview | ScienceDirect Topics
QT dispersion is defined as the maximum – minimum QT intervals on the 12-lead surface ECG. The normal range for QT dispersion is 40 to 50 ms with a maximum of 65 ms. The QT dispersion values of 65 ms or greater carry a high risk of ventricular arrhythmias and is …
Measurement, interpretation and clinical potential of QT dispersion ...
QT dispersion was originally proposed to measure spatial dispersion of ventricular recovery times. Later, it was shown that QT dispersion does not directly reflect the dispersion of recovery times and that it results mainly from variations in the T loop morphology and …
QT dispersion: problems of methodology and clinical significance
QT dispersion is defined as the difference in QT interval between the different leads of the surface 12-lead ECG. This may provide an indirect measure of the underlying inhomogeneity of myocardial repolarization, which is believed to be important in arrhythmogenesis. Methodology for determining QT d …
Measurement, interpretation and clinical potential of QT dispersion ...
QT dispersion is determined by the relative extent of normal, hibernating, and scarred myocardium in patients with chronic ischemic cardiomyopathy. A dobutamine stress echocardiography study before and after surgical revascularization
QT Dispersion - an overview | ScienceDirect Topics
QT dispersion (QTd) is an electrocardiographic marker that was suggested to reflect on repolarization heterogeneity and its measurement is based on the assumption that each electrocardiographic lead measures regional repolarization.
QT离散度的临床应用及研究进展 - 百度文库
QT离散度（QT dispersion，QTd）指体表l2导联心电图各导联间QT间期存在的差异，至今QTd已作为衡量心肌复极不均一性和电不稳定性的一个重要指标，临床应用上日趋广泛，可对心肌缺血、心肌病变、心室肥厚、再灌注治疗的疗效等进行评价，其具有重要的临床研究 ...
QT Dispersion - an overview | ScienceDirect Topics
QT dispersion (QTd) has been proposed as an indirect electrocardiography (ECG) measure of heterogeneity of ventricular repolarization. You might find these chapters and articles relevant to this topic. Abigail Dee Antigua PharmD, BCCCP, Kacee Barnett PharmD, in …
QT dispersion was originally proposed to measure spatial dispersion of ventricular recovery times. Later, it was shown that QT dispersion does not directly reflect the dispersion of recovery times and that it results mainly from variations in the T loop morphology and …