NGHIÊN CỨU ĐẶC ĐIỂM HÌNH THÁI, CHỨC NĂNG CỦA NHĨ TRÁI VÀ CHỈ SỐ TƯƠNG HỢP NHĨ TRÁI - THẤT TRÁI BẰNG SIÊU ÂM TIM Ở BỆNH NHÂN HỘI CHỨNG ĐỘNG MẠCH VÀNH MẠN

Abstract

Objective: To investigate left atrial morphological and funtional indices and left atrioventricular coupling index (LACI) using echocardiography in patients with chronic coronary syndrome (CCS). Subjects and methods: In a descriptive cross-sectional study, 104 research subjects divided into two groups comprising 64 patients with CCS having greater than 50% stenosis of the epicardial coronary arteries and 40 control individuals with results of computed tomography of the coronary arteries (CCTA) without significant epicardial coronary artery stenosis at the Cardiovascular Department and the Cardiovascular Interventional Department, 103 Military Hospital from October 2024 to April 2025. Results: The left atrial diameter index (LADi), maximum left atrial volume index (maxLAVi), minimum left atrial volume index (minLAVi), and pre-atrial volume index (preLAVi) in group with CCS were larger than those in the control group (p < 0.05). The total left atrial ejection fraction (LATEF), passive left atrial ejection fraction (LAPEF), and active left atrial ejection fraction (LAAEF) in group with CCS were all reduced compared to the control group (p < 0.05). LACI in group with CCS was significantly higher than that in the control group (p < 0.001). Conclusion: In group with CCS, the left atrial dimensions were larger and the left atrial functions were impaired compared with the control group. LACI in group with CCS was significantly higher than that in the control group.