Objective To study the effect of trofiban(aplatelet glycoprotein Ⅱb/Ⅲa receptor)injected into coronary artery via a suction catheter on no reflow in patients with ST-segment elevation acute myocardial infarction during PCI.Methods Sixty patients with ST-segment elevation acute myocardial infarction who underwent emergency PCI via a suction catheter were randomly divided into control group(n=30)and experimental group(n=30).The patients in control group were treated with catheter-guided trofiban injection aft...