title: [Predictors of the no-reflow phenomenon after primary percutaneous coronary intervention for acute myocardial infarction].
abstract: OBJECTIVE
  To identify the risk factors for no-reflow (NR) phenomenon after primary percutaneous coronary intervention (PCI) in patients with acute myocardial infarction.
  
  
  METHODS
  A total of 843 patients with AMI underwent primary PCI within 12 h following onset of the ischemic symptoms. According to TIMI flow grade and myocardial blush grade, the patients were divided into reflow group and NR group after primary PCI, and the clinical data, angiography findings and surgical data were compared to analyze the factors contributing to NR.
  
  
  RESULTS
  NR occurred in 15.9% of the AMI patients after primary PCI. Univariate analysis showed that previous myocardial infarction, Killip classes of MI, time to reperfusion, IABP use before PCI, TIMI flow grade before primary PCI, long target lesion, pre-PCI thrombus score and method of reperfusion were correlated to NR (P<0.05 ). Multiple logistic analysis identified the time to reperfusion (OR=1.60; 95% CI: 1.02-2.73), TIMI flow grade before primary PCI (OR=1.1; 95% CI: 1.04-1.16), long target lesion (OR=1.40; 95% CI: 1.19-1.69), and pre-PCI thrombus score (OR=2.02; 95% CI: 1.47-2.76) as the independent predictors of NR after primary PCI.
  
  
  CONCLUSIONS
  The time to reperfusion, TIMI flow grade before primary PCI, long target lesion, and pre-PCI thrombus score are independent predictors of NR after primary PCI for AMI.
authors.affiliation: General Hospital of PLA, Beijing 100853, China. zhaoying301doctor@126.com
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yundai
authors.initials: Y
authors.lastname: Chen
authors.forename: Feng
authors.initials: F
authors.lastname: Tian
authors.forename: Changhua
authors.initials: C
authors.lastname: Wang
authors.forename: Shunying
authors.initials: S
authors.lastname: Hu
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Junjie
authors.initials: J
authors.lastname: Yang
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000628:therapy*; D054318:No-Reflow Phenomenon / Q000453:epidemiology* / Q000209:etiology; D062645:Percutaneous Coronary Intervention; D012307:Risk Factors