Our aim was to correlate functional and perfusion abnormalities early post primary percutaneous coronary intervention after acute myocardial infarction in ST elevation myocardial infarction patients to estimate myocardial salvage, and to predict left ventricular ejection fraction (LVEF) recovery and remodeling in gated SPECT at follow-up.

Myocardial Salvage and Infarction Size assessed by an early gated Single Photon Emission Computed Tomography Myocardial Perfusion Image study can predict Left Ventricle Ejection Fraction evolution after primary Percutaneous Coronary Intervention for Acute Myocardial Infarction.

Inclusion Criteria:

• STEMI patients underwent primary PCI.

Exclusion Criteria:

• Patients who were lost to follow-up at 6 months post index-SPECT MPI study.
• Patients subsequently underwent a coronary revascularization procedure [percutaneous coronary intervention (PCI) or coronary bypass surgery (CABG)] within 60 days post index-SPECT MPI post PCI.
• Patients had a documented history of prior MI or coronary revascularization
• Patients with severe valvular disease and/or non-ischemic cardiomyopathy.
• Patients with renal and/or hepatic critical illness.

The study population is a consecutive cohort of patients post primary PCI at Kasr Al-Aini Cardiac Centre, Cairo University.