Key result
A precise lengthening of the QT interval is neither necessary nor sufficient for the development of drug-induced torsades de pointes, which may instead involve abnormal giant U waves.
Design
Review
Authors
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QT prolongation should not be sole torsades predictor; leaves open giant U waves as mechanistic alternative.
The paper highlights that QT interval prolongation alone is insufficient to predict drug-induced torsades de pointes, suggesting a potential role for abnormal giant U waves.
Joel Morganroth (1993) conducted a review in Torsades de pointes. Antiarrhythmic drugs was evaluated. A precise lengthening of the QT interval is neither necessary nor sufficient for the development of drug-induced torsades de pointes, which may instead involve abnormal giant U waves.
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