Why the study?
Does expressing QT dispersion as a percentage of cycle length (QT dispersion ratio) improve the identification of patients who develop ventricular fibrillation compared to standard rate correction in patients with myocardial infarction?
Does expressing QT dispersion as a percentage of cycle length (QT dispersion ratio) improve the identification of patients who develop ventricular fibrillation compared to standard rate correction in patients with myocardial infarction?
Expressing QT dispersion as a ratio of cycle length may offer a better method than standard rate correction for predicting ventricular fibrillation in acute myocardial infarction.
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Should not alter post-MI VF risk stratification yet; leaves open prospective validation of ratio vs standard correction.
Higham et al. (1995) studied this question.
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