الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
CAD is a chronic disease with symptoms that require ongoing monitoring and treatment to prevent further complications such as myocardial infarction and chronic heart failure. ECG is a necessary tool for the diagnosis of myocardial infarction and cardiac arrhythmia. The QT interval reflects the duration of ventricular electrical activity, determined by the phases of depolarization and repolarization.tQT dispersion (maximum QT interval minus minimum QT interval) was originally proposed as an index of the spatial dispersion of ventricular recovery times. In reality, QT dispersion is a crude and approximate measure of a general abnormality of repolarization; it reflects inhomogeneity of ventricular repolarization. This study was carried out aiming to compare QT dispersion in patients presenting with STEMI and treated with thrombolytic therapy versus those treated with PCI therapies.The study was carried out at Cardiology Department in Specialized Medical Hospital, Mansoura University. Approval to conduct this study was obtained. Also, written consents were obtained from the patients to participate in the study.