QT dispersion in medicine: electrophysiological Holy Grail or …
网页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 to determine the values of these two extreme indices.
QT Dispersion - CHEST
网页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.
Measurement, interpretation and clinical potential of QT dispersion ...
网页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 the error of QT measurement.
QT Dispersion - an overview | ScienceDirect Topics
网页QT dispersion (QTd) is simply measured as the difference between the longest and shortest QT interval within the normal 12-lead ECG. QTd is often increased in patients with idiopathic dilated cardiomyopathy and CHF, but it does not necessarily predict an increased risk of arrhythmic death [42,43].
qt-dispersion-clinical-applications - UpToDate
网页The causes and pathophysiology of acquired LQTS, as well as the clinical manifestations,… reversed QT prolongation and QT morphologic changes (U waves and bifid T waves), and decreased QT dispersion. It is uncertain, however, if this therapy is effective for preventing or reversing TdP.
Measurement of QT dispersion - Heart
网页More recently, there has been an increasing interest in what has become known as QT dispersion, which is defined as the difference between the maximum and minimum QT interval of the 12 lead ECG.2 A number of publications has shown a relation between increased QT dispersion and death from a cardiac …
Sport-related differences in QT dispersion and echocardiographic ...
网页2023年4月25日 · The aim of this study was to compare QT dispersion (QTd) and echocardiographic parameters in male athletes competing across different sports (long-distance running, volleyball, football,...
QT Dispersion - an overview | ScienceDirect Topics
网页QT Dispersion refers to the interlead variability of QT intervals on the surface ECG, which indirectly measures myocardial repolarization inhomogeneity. It is associated with an increased risk for arrhythmic events and sudden cardiac death in patients with myocardial infarction and congenital long QT syndrome.
Measurement and interpretation of QT dispersion - PubMed
网页QT dispersion was proposed as an index of the spatial inhomogeneity of ventricular recovery times. The results of studies that found significant correlation between dispersion of ventricular recovery times measured with monophasic action potentials and QT dispersion were interpreted as proof of the ….
QT Dispersion: Current and Future Clinical Role - PubMed
网页This review focuses on the conceptual evolution, currently accepted methodology, and clinical and research applications of QT dispersion measurements. QT dispersion calculated from the standard 12-lead ECG has emerged as a noninvasiveive measurement of the degree of inhomogeneity in myocardial repolarization.