title: Influence of balloon pressure inflation in patients undergoing primary coronary stent implantation during acute myocardial infarction. A quantitative coronary angiography analysis.
abstract: OBJECTIVE
  To verify the influence of moderate- or high-pressure balloon inflation during primary coronary stent implantation for acute myocardial infarction.
  
  
  METHODS
  After successful coronary stent implantation, 82 patients were divided into 2 groups according to the last balloon inflation pressure: group 1 (> or = 12 to < 16 atm) and group 2 (> or = 16 to 20 atm), each with 41 cases. All patients underwent late coronary angiography.
  
  
  RESULTS
  In group 1, the mean stent deployment pressure was 13.58 +/- 0.92 atm, and in the group 2 it was 18.15 +/- 1.66 atm. Stents implanted with moderate pressures (> or = 12 to < 16 atm) had a significantly smaller post-procedural minimal lumen diameter, compared to with those with higher pressure, with lesser acute gain (2.7 +/- 0.4 mm vs 2.9 +/- 0.4 mm; p = 0.004), but the late lumen loss (0.9 +/- 0.8 mm vs 0.9 +/- 0.6 mm) and the restenosis (22% vs. 17.1%) and target-vessel revascularization rates (9.8% vs 7.3%) were similar between the groups.
  
  
  CONCLUSIONS
  During AMI stenting, the use of high pressures (> or = 16 atm) did not cause a measurable improvement in late outcome, either in the late loss, its index, and the net gain, or in clinical and angiographic restenosis rates.
authors.affiliation: Instituto Dante Pazzanese de Cardiologia, Brasil. pivmattos@uol.com.br
authors.forename: Luiz Alberto
authors.initials: LA
authors.lastname: Mattos
authors.forename: Amanda G
authors.initials: AG
authors.lastname: Sousa
authors.forename: Aurea
authors.initials: A
authors.lastname: Chaves
authors.forename: Fausto
authors.initials: F
authors.lastname: Feres
authors.forename: Ibraim
authors.initials: I
authors.lastname: Pinto
authors.forename: Luiz
authors.initials: L
authors.lastname: Tanajura
authors.forename: Marinella
authors.initials: M
authors.lastname: Centemero
authors.forename: Alexandre
authors.initials: A
authors.lastname: Abizaid
authors.forename: Ana C
authors.initials: AC
authors.lastname: Seixas
authors.forename: Andréa
authors.initials: A
authors.lastname: Abizaid
authors.forename: Galo
authors.initials: G
authors.lastname: Maldonado
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Staico
authors.forename: J Eduardo M
authors.initials: JE
authors.lastname: Sousa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary; D002985:Clinical Protocols; D017023:Coronary Angiography; D023903:Coronary Restenosis / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000628:therapy*; D011312:Pressure; D011446:Prospective Studies; D015607:Stents; D016896:Treatment Outcome