Influence of balloon pressure inflation in patients undergoing primary coronary stent implantation during acute myocardial infarction: a quantitative coronary angiography analysis

• Autor(a) principal: Mattos,Luiz Alberto
• Data de Publicação: 2003
• Outros Autores: Sousa,Amanda G.M.R., Chaves,Áurea, Feres,Fausto, Pinto,Ibraim, Tanajura,Luiz, Centemero,Marinella, Abizaid,Alexandre, Seixas,Ana C., Abizaid,Andréa, Maldonado,Galo, Staico,Rodolfo, Sousa,J. Eduardo M.R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Arquivos Brasileiros de Cardiologia (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2003000300002
• topic: acute myocardial infarction; stents; restenosis

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 (<FONT FACE=Symbol>³</FONT>12 to <16 atm) and group 2 (<FONT FACE=Symbol>³</FONT>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 (<FONT FACE=Symbol>³</FONT>12 to <16 atm) had a significantly smaller postprocedural minimal lumen diameter, compared to with those with higher pressure, with lesser acute gain (2.7± 0.4 mm vs 2.9±04 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. CONCLUSION: During AMI stenting, the use of high pressures (<FONT FACE=Symbol>³</FONT>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.