Abstract: Objective  To analyze the related factors of slow coronary flowno reflow (SCF/NR) after percutaneous coronary intervention (PCI) for acute coronary syndrome.  Methods  Totally 152 patients with acute STsegment elevation myocardial infarction (STEMI) undergoing PCI were selected. According to TIMI flow grades after PCI,  they were divided into SCF/NR group and normal flow group. The related influencing factors of SCF/NF in two groups patients were analyzed after PCI. Results  There were no statistically significant differences between two groups in sex,  BMI,  hypertension history,  family history,  smoking,  drinking,  preoperative TIMl flow grades,  killip grades,  occult blood in urine,  left ventricular end systolic diameter,  infarctrelated artery,  lesion location,  diffuse degree,  interventional therapy method,  ejection fraction,  WBC,  AST,  TC,  TG,  HDLC,  LPa,  Cysc,  K+,  PT,  INR,  APTT,  DD,  number of lesion vessels,  length of lesion vessels,  diameter of lesion vessels and stent number(P>0.05).  Compared with patients in nonSCF/NF group,  Gender  in SCF/NF group were older and had higher incidence of diabetes mellitus,  higher LDLC,  and longer time from onset to vascular patency (P<0.05). Multivariate Logistic regression analysis showed that age,  LDLC,  time from onset to vascular patency were independent risk factors for SCF/NR after surgery. Conclusion  Age,  LDLC,  time from onset to vascular patency are independent risk factors for SCF/NR in acute coronary syndrome after PCI.

Key words: acute coronary syndrome, angioplasty, , balloon, , coronary, postoperative slow blood flowno reflow