Abstract
The International Conference on Harmonization (ICH) guidance note E14 requires a thorough QT (TQT) study to characterize proactively the potential of a new drug to affect cardiac repolarization, as determined by prolongation of the corrected QT (QTc) interval. A typical TQT study is reviewed herein with a discussion on various practical issues concerning the use of a supratherapeutic dose, establishing assay sensitivity, the application of QT rate-correction methods, and restricting analyses of ECGs and plasma samples to key timepoints.
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