1-history taking , clinical examination & assessment of clinical risk factors of coronary heart disease as ( age , sex , family history ,DM , HTN ,smoking , addiction and type of addiction , previous ACS ,previous PCI , psychic trauma ,history of chest obstructive , renal and vascular disease , weight ,length ,BMI ,BSA , obesity , KILLIP class , ischemic time , preinfarction angina ,mode of transport 2-12 lead ECG before and after PPCI. 3-Angiongraphic findings, acute results of PPCI ( previous PCI , culprit artery , if MVD , which segment affected ,presence or absence of visible thrombus ,type of penetrating wire ,direct stenting or not ,type of the stent , name of the stent , number of stents , diameter and length of each stent , usage of thrombus aspiration , balloon dilatation ,diameter and length of the balloon ,and inflation pressure ,volume of contrast ,final TIMI flow ,presence of collaterals.