The Short-term Effects of Delayed Percutaneous Transluminal Coronary Angioplasty and Implanting Intracornary Stents on Myocardial Perfusion and Left Ventricular Function in Patients with Acute Myocardial Infarction

Objective:To assess the short term effects of delayed percutaneous transluminal coronary angioplasty (PTCA) and implanting intracoronary stents on myocardial perfusion and left ventricular function in patients with acute myocardial infarction (AMI).Methods:56 patients with AMI were divided into delayed PTCA +stent group (treatment group) and control group.The treatment group were received delayed PTCA and coronary artery stents after AMI 15~30 days.The first examination of 99 Tc MIBI and two dimensional echocardiography was performed before PTCA +stent 1~3d ays (treatment group) and after AMI 15~30 days (control group).And followed the second examination (1 month later),the third (6 months later).Results:One month and half year after procedure (PTCA +stent),the blood flow deficit degree of myocardial infarction area in treatment group was better improved.But there were no significant difference in post procerdure (one month later and six month later ( P 0.05).So were the ventricular wall motion abnormality scores,left ventricular diatation and left ventricular ejction fraction (LVEF) ( P 0 01).And there were no significant difference in the left ventricular aneurysms ( P 0.05).Conclusion:There are residual myocardial viability in the AMI regions and PTCA+stent keeps more joepardized myocardial viable.Active therapy after AMI can significantly improve left ventricular function and myocardial perfusion.