Dispersion of Repolarization and Arrhythmogenicity
If you ask 5 cardiologists and 5 toxicologists about the best way to predict the risk of Torsade de Pointes (TdP) in a patient with a prolonged QT, you will likely get 11 different answers. Here is what we know: A corrected QT (QTc) interval > 500 msec is associated with an increased risk of TdP (1). Not every patient with a QTc interval > 500 msec develops TdP (1). Not every patient with TdP has a QTc > [...]