KHẢO SÁT ĐẶC ĐIỂM CẦU CƠ MẠCH VÀNH TRÊN BỆNH NHÂN NHỒI MÁU CƠ TIM CẤP BẰNG CHỤP MẠCH VÀNH QUA DA

Abstract

Background: Myocardial bridging is an anatomical anomaly of the coronary arteries that can alter hemodynamics, lead to myocardial ischemia, and is associated with cardiovascular events, particularly acute myocardial infarction. The pathogenic role and clinical significance of myocardial bridging remain controversial, especially in cases without evident atherosclerotic lesions. Therefore, we conducted a study to investigate the characteristics of myocardial bridging in patients with acute myocardial infarction. Objectives: To evaluate the characteristics of myocardial bridging in patients with acute myocardial infarction using coronary angiography. Methods: This was a retrospective cross-sectional study describing patients with acute myocardial infarction (AMI) who underwent coronary angiography at the Interventional Cardiology and Cardiology Departments, Chợ Rẫy Hospital, from October to December 2023. Results: A total of 151 AMI patients were included (mean age 64.5 ± 13 years; 74.2% male). Hypertension was the most common comorbidity (86.1%), followed by dyslipidemia (68.2%) and smoking (63.6%). Myocardial bridging (MB) was detected in 24 patients (15.9%), with 25 MB sites identified. All bridges were located on the left anterior descending artery (LAD), most frequently at LADII (80%). The average bridge length was 14.2 ± 5.3 mm (range: 4.86–23 mm). The %MLA during systole was significantly higher at LADII than at other sites. MB was not independently associated with significant LAD stenosis (OR 0.4, p = 0.079). Conclusions: MB prevalence in AMI patients was 15.9%, exclusively on LAD, with 80% at LADII. LADII bridges had higher %MLA during systole. MB was not independently associated with significant LAD stenosis.