title: Direct infarct artery stenting without predilation and no-reflow in patients with acute myocardial infarction.
abstract: BACKGROUND
  In patients with acute myocardial infarction (AMI), the rate of microvascular embolization and no-reflow promoted by coronary stenting with the use of conventional techniques (CS) appears to be greater than the one that occurs with balloon angioplasty. The minor invasiveness of direct stenting (DS) of the infarct artery without predilation could be expected to reduce embolization in the coronary microvasculature and no-reflow in patients with AMI.
  
  
  METHODS
  In a cohort of 423 consecutive patients with AMI who underwent infarct-artery stenting, we compared CS and DS in terms of angiographic no-reflow rate and 1-month clinical outcome.
  
  
  RESULTS
  At baseline patients who underwent DS (n = 110) had a better risk profile compared with the use of CS (n = 313). The incidence of angiographic no-reflow was 12% in the CS group and 5.5% in the DS group (P =.040). The 1-month mortality rate was 8% in the CS group and 1% in the DS group (P =.008). The mortality rate was 11% in patients with no-reflow and 5.6% in patients with a normal flow. Multivariate analysis showed that age, preprocedure patent infarct artery, and lesion length were related to the risk of no-reflow. In the subset of patients with a target lesion length </=15 mm, the variables independently related to the risk of no-reflow were age, DS, and final balloon inflation pressure.
  
  
  CONCLUSIONS
  DS in patients with AMI may reduce the incidence of angiographic no-reflow, thereby increasing ultimate effective myocardial reperfusion.
authors.affiliation: Division of Cardiology, Careggi Hospital, Florence, Italy. carddept@tin.it
authors.forename: D
authors.initials: D
authors.lastname: Antoniucci
authors.forename: R
authors.initials: R
authors.lastname: Valenti
authors.forename: A
authors.initials: A
authors.lastname: Migliorini
authors.forename: G
authors.initials: G
authors.lastname: Moschi
authors.forename: L
authors.initials: L
authors.lastname: Bolognese
authors.forename: G
authors.initials: G
authors.lastname: Cerisano
authors.forename: P
authors.initials: P
authors.lastname: Buonamici
authors.forename: G M
authors.initials: GM
authors.lastname: Santoro
mesh_terms: D000208:Acute Disease; D000368:Aged; D001158:Arteries / Q000601:surgery; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000517:prevention & control; D023903:Coronary Restenosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000517:prevention & control; D003331:Coronary Vessels / Q000601:surgery*; D004617:Embolism / Q000000981:diagnostic imaging / Q000517:prevention & control; D005260:Female; D006801:Humans; D008297:Male; D008833:Microcirculation / Q000000981:diagnostic imaging; D008875:Middle Aged; D009203:Myocardial Infarction / Q000601:surgery*; D015425:Myocardial Reperfusion / Q000706:statistics & numerical data; D009204:Myocardial Revascularization / Q000379:methods*; D015607:Stents / Q000706:statistics & numerical data*