QTd is a useful surrogate marker for adverse functional prognosis, which might help to stratify risk in patients with acute IS. Keywords: acute ischemic stroke, functional outcome, QT dispersion, recurrent vascular event, TIA. Stroke is one of the most common causes of …

QT dispersion (QTd) has been proposed as an indirect ECG measure of heterogeneity of ventricular repolarization. The predictive value of QTd in acute stroke remains controversial. We aimed to clarify the relationship between QTd and acute stroke and stroke prognosis.

2000年11月15日 · Many clinical studies have measured QT dispersion only in the six precordial leads. In addition, other lead combinations, such as the orthogonal XYZ or “quasiorthogonal” I, aVF or V2 leads, have also been studied.

2016年2月12日 · 摘要:目的: 观察冠状动脉旁路移植术 (CABG)对QT离散度 (QTd)的影响,探讨其临床价值。 方法: 选取39例行CABG成功的患者作为实验组,测量分析其术前7d、术后1~7d以及14d的QTd及心率校正的QT离散度 (QTcd)的变化,同时观察左室射血分数 (LVEF)的变化及心绞痛缓解程度,并以42例冠状动脉造影确诊为冠心病而暂未行血运重建术患者作为对照组。 结果: CABG患者术前的QTd较正常参考值明显增加,术后3d内的QTd与术前相比,均有增加,其中以术后2d为最高,QTd …

2000年1月4日 · To test the independence of QTc and QTD as predictors of mortality, multivariate Cox models were used, including age, sex, body mass index (BMI), diabetes, diastolic and systolic blood pressures, HDL and LDL cholesterol, albuminuria, alcohol use, history of smoking or prevalent CHD, and tribal center.

QT 离散度(QT dispersion, QTd) ,指体表12 导联心电图各导联间QT 间期存在的差异程度,反映心室肌复极的不均一性, 代表心室肌兴奋恢复时间不一致程度[8],这一现象早为人所发现,但未被重视,直到1985 年Campbell 等在12 导同步记录的心电图中发现这一规律性现象并提出QT ...

2021年1月21日 · Several studies have confirmed the association between acute cerebrovascular events and QTd (8 – 12). In patients admitted to hospital for acute cerebrovascular diseases, QTd may reflect neurologic injury as well as the underlying heart disease. Thus, it can be used as a marker of adverse clinical prognosis after acute ischemic stroke.

1998年12月15日 · This study examines the relation of QT dispersion (QTd) on a surface electrocardiogram (ECG) to clinical features and established risk factors of sudden cardiac death (SCD) in patients with hypertrophic cardiomyopathy (HC).

Measuring QT dispersion (QTd) is a fairly straightforward and noninvasive technique for predicting mortality in patients at high risk following a myocardial infarction (MI).

QT dispersion (QTd) is equal to longer QTc minus shorter QTc measured by 12-lead electrocardiogram (ECG). QTd reflects inhomogeneity in repolarization of ventricular myocardium and because of easy and fast measurement of QTd, it can be used to predict high-risk patients for dysrhythmia after Acute Myocardial Infarction (AMI).