OBJECTIVE The interlead variation in duration of the Q-T interval on the surface electrocardiogram (Q-T interval dispersion [QTd]) has been shown to predict mortality in type 2 diabetic patients. We evaluated the prevalence of QTd prolongation in the EURODIAB population and its relation to corrected Q-T interval (QTc), sex, age, duration of diabetes, blood glucose control, and complications. RE...

BACKGROUND QT dispersion, commonly measured in sinus beats (QTd-S), can also be calculated in premature ventricular beats (QTd-V). To date, no studies have addressed the relation between these 2 variables. METHODS AND RESULTS In 148 patients with remote myocardial infarction and premature ventricular beats on a routine ECG, QT dispersion, defined as the difference between the maximum and the ...

Electrocardiography (ECG) is a useful monitoring method during anesthesia. Among the numerous ECG parameters, QT dispersion (QTd) is an indicator of instability during ventricle repolarization. According to previous reports, an increase of QTd may be occurred any patients with sympathetic instability. However, almost all such noncardiac patients have a physical status of 1 or 2 according to the...

The relationship between QT dispersion and myocardial ischemia is still controversial. Therefore, we aimed to investigate the relationship between QTd and the severity and extent of myocardial ischemia. In this cross-sectional study, 141 patients having symptoms of CAD who referred to our medical center during 2009-2010, and were examined with myocardial isotope scan and ECG, were enrolled. Bas...

BACKGROUND Increased QT dispersion (QTd) has been implicated as a marker of arrhythmogenesis and cardiac death. Paucity of literature on QTd in Nigeria necessitated an inquiry into QTd in adult hypertensive population. This study sought to: (i) compare the QTd values of adult hypertensive subjects with age and sex matched normotensive subjects and (ii)examine the relationship between QTd and le...

QT dispersion (QTd) is a measure of interlead variations of the surface 12-lead electrocardiogram (ECG). Increased QTd, found in various cardiac diseases, reflects cardiac instability and is associated with increased risk for cardiac death. Research suggests a link between antipsychotics, ECG abnormalities (QT prolongation) and increased sudden cardiac mortality rates. However, QTd analysis has...

INTRODUCTION The QT interval on the resting electrocardiogram (ECG) expresses the myocardial depolarisation and repolarisation time. Elevated values of QT dispersion (QTd) are associated with cardiovascular mortality in diabetics. Cardiac autonomic neuropathy (CAN) is a common complication of diabetes that is also associated with increased morbidity and mortality. However, there are no data in ...

OBJECTIVE To establish a general method to estimate the measuring error in QT dispersion (QTD) determination, and to assess this error using a computer program for automated measurement of QTD. SUBJECTS Measurements were done on 1220 standard simultaneous 12 lead electrocardiograms. DESIGN The computer program was validated against two observers on a random subset of 100 electrocardiograms....

OBJECTIVE To assess the stability and reproducibility of computerised QT dispersion (QTd) measurement in healthy subjects, as this is presently being incorporated into commercial electrocardiographic systems. METHODS 70 healthy volunteers (mean (SD) age 38 (10) years, 35 men, 35 women) with a normal 12 lead electrocardiogram (ECG) were studied. From each subject, 70 ECG recordings were taken ...

the relationship between qt dispersion and myocardial ischemia is still controversial. therefore, we aimed to investigate the relationship between qtd and the severity and extent of myocardial ischemia. in this cross-sectional study, 141 patients having symptoms of cad who referred to our medical center during 2009-2010, and were examined with myocardial isotope scan and ecg, were enrolled. bas...