南方医科大学学报2012，Vol.32Issue(4)：492-495,4.DOI:10.3969/j.issn.1673-4254.2012.04.011
早期心肌缺血状态下左心室腔内涡流特征
Quantitative characterization of vortex flow in patients with early myocardial ischemia by echocardiography using vector flow mapping
摘要
Abstract
Objective To quantitatively characterize vortex flow in patients with early myocardial ischemia by echocardiography using vector flow mapping (VFM) and explore a new diagnostic index of early myocardial ischemia.Methods This study was conducted among 105 patients with suspected angina pectoris,who were free of a previous cardiac history with a normal ejection fraction.Patients without significant coronary artery stenoses constituted the control group (n=49) and those with significant coronary artery stenoses (n=56) constituted the early myocardial ischemia group.All the patients underwent conventional ultrasonic inspection and VFM.The velocity vector and vorticity were estimated by VFM.The vortex parameters including vortex flow,radius,diameter,area and vortex relative strength index were measured.Results No significant differences were found in the vortex parameters including the vortex flow,radius,diameter or area between the two groups (P> 0.05),but vortex relative strength index was significantly lower in early myocardial ischemia group (23.68±11.66 vs 20.20±6.29,P<0.05).Conclusion VFM is feasible for quantitative evaluation of left ventricular vorticity in healthy individuals and patients with early myocardial ischemia,and the vortex relative strength index may serve as a novel index for the diagnosis of early myocardial ischemia.关键词
血流速度向量成像技术/涡流/早期心肌缺血Key words
vector flow mapping/vortex flow/early myocardial ischemia分类
医药卫生引用本文复制引用
童锴,张瑾,王晶,周肖,徐勇,智光..早期心肌缺血状态下左心室腔内涡流特征[J].南方医科大学学报,2012,32(4):492-495,4.基金项目
国家自然科学基金(30970836) （30970836）
