Unsuitability of Corrected QT Dispersion as a Marker for Ventricular Arrhythmias and Cardiac Sudden Death After Acute Myocardial Infarction

The present study investigated whether corrected QT (QTc) dispersion could play a role as a marker of ventricular arrhythmias and sudden cardiac death after acute myocardial infarction (MI). The study included 76 males and 24 females with a mean age of 60±11 years. Standard 12-lead ECGs were recorded during the recovery phase (15±9 days) after the onset of MI. The QTc was calculated according to Bazett's formula and QTc dispersion was calculated as the difference between the maximum and minimum QTc intervals. Patients were divided into 2 groups: 21 patients (group A) had a QTc dispersion of ≥80 ms, and the other 79 patients (group B) had a QTc dispersion of