الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Cardiovascular diseases are currently the leading cause of death in industrialized countries and are expected to become so in developing countries.[1] Left ventricular (LV) dysfunction is the single strongest predictor of mortality and one of the most frequent and deadly complications following ST segment elevation myocardial infarction , and this complication has been greatly reduced in the era of primary PCI.[3] • This work aimed at studying the effect of the duration of ischemia on the extent and improvement of the wall motion abnormality after revascularization and follow up after 40 days. • This study was conducted on 60 patients with first STEMI presented to Tanta university hospitals and treated by primary PCI. • The study duration was from August 2020 to August 2021, the patient were treated by primary PCI • The study populations showed 37 patients presented within 12 hours while 23 patients presented after 12 hours • The two groups were assessed as regard angiographic results and echocardiographic parameters at discharge and after 40 days . Echocardiography assessment included: • Ejection fraction by Simpson‘s method. • Resting segmental wall motion abnormality using Wall motion score index . • Our study which conducted on 60 patients showed importance and effect of time factor on EF and SWMA . The early restoration of perfusion on occluded artery The more significant improvement on EF and SWMA on follow up.