The effects of myocardial contrast echocardiography in myocardial perfusion testing after coronary revascularization

Objective To investigate the significance of myocardial contrast echocardiography(MCE) during follow-up period after coronary revascularization in the patients with ischemic cardiomyopathy.Methods The patients(n=36) were respectively given intracoronary stent implantation or coronary artery bypass grafting(CABG) for coronary revascularization,and then their were given real-time MCE and graded according to the filling degree of contrast before coronary revascularization,and at early stage(one month) and late stage(6-12 months) after coronary revascularization.All results were compared and analyzed with the results of coronary angiography(CAG) and/or coronary enhanced CT angiography(CTA) in corresponding stages.Results The detection and analysis were conducted according to 16-segment myocardial segment method(recommended by American Society of Echocardiography).Among 576 segments in 36 patients,there were 247 dysfunctional segments.The matching rate between MCE and CAG before treatment was 89.9%.There were 172 segments improved at the early stage after coronary revascularization,and the matching rate between MCE and blood-supply area of stent or CABG target vessels was 78.6%.At the late stage after coronary revascularization,the matching rate between MCE and CAG reduced to 80.56%.Conclusion Real-time MCE can be used for following and observing the improvement of myocardial perfusion in clinical follow-up after coronary revascularization.