الفهرس 
Introduction
Pathophysiology of arrhythmic complicationsOnly 14 pages are availabe for public view
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Abstract
QT dispersion, defined as the difference between maximum and minimum QT interval measured at 12 lead ECG, is the most simple and widely used index of ventricular dispersion.
Increased ventricular dispersion predicts predisposition to cardiac arrhythmia and therefore affects the prognosis of patients after myocardial infarction.
In this study we evaluated whether QT dispersion can predict the arrhythmogenic potential in acute myocardial infarction (AMI) and whether it can behave as a risk stratification tool in such patients.
We also evaluated incidence of ventricular arrhythmias with different sites of AMI i.e.: anterior, inferior and lateral walls.
In all, 101 patients were included in the study. Mean QT dispersion at presentation was 112±5.4 msec. those who were thrombolysed, or survived or did not develop significant ventricular arrhythmias had significantly lower QT dispersion than their comparative groups (P<0.001).
We found that anterior wall MI was 58 cases, inferior wall was 41 cases and 2 cases was lateral wall MI.
We found that the incidence of runs of ventricular tachycardia was a total of 12cases, 11cases with anterior MI and one case with inferior MI while sustained VT incidence was a total of 9 cases, 7cases with anterior MI and two cases with inferior MI.
There were 3cases of ventricular fibrillation with anterior MI and one case with inferior MI, 2nd. And 3rd. degrees heart block occurred mostly with inferior MI.
Conclusion:
In our study we found that measuring QT dispersion from presentation till discharge can provide a method of risk stratification of AMI patients and can detect patients who are at increased risk of developing ventricular arrhythmias and increased cardiac mortality.