QT DISPERSION - CURRENT AND FUTURE CLINICAL ROLE

QT dispersion calculated from the standard 12-lead ECG has emerged as an noninvasive measurement of the degree of inhomogeneity in myocardia l repolarization. The studies evaluating predictive value of QT disper sion for identification of patients at increased risk for serious vent ricular arrhythmias and sudden cardiac death have been conducted in mu ltiple disease states and show promising results. This review focuses on the conceptual evolution, currently accepted methodology, and clini cal and research applications of QT dispersion measurements.