自然组织谐波成像对冠心病室壁运动的评价

目的：评价自然组织谐波成像（NTHI）技术在对冠心左内膜的识别和左室壁运动评价方面的应用价值。方法：对33例冠心病患者行常规和NTHI二维超声检查。采用胸骨旁左室长轴、心尖四腔、二腔切面、心内膜识别分4级，壁运动分析采用16节段法。结果：NTHI改善了57．2％（302／528）节段的心内膜识别，改变了12．7％（67／528）节段的室壁运动级别。结论：应用自然组织谐波技术可改善冠心病病人心内膜的超声识别，进而增加对冠心病病人室壁运动分析的准确性。

Evaluation of left ventricular segmental wall motion by natural tissue harmonic imaging in patients with coronary artery disease

Objectives: To evaluate the effect of the natural tissue harmonic imaging(NTHI) on endocardial border detection and left ventricular segmental wall motion evaluation in patients with coronary artery heart disease(CAD). Methods: Ordinary 2D echocar- diography (2DE) and NTHI were performed in 33 patients with CAD(27 with myocardial infarction and six with angina pectoris). Parasternal long axis(LAX), apical four-and two-chamber views(AP4CH, and AP2CH) were adopted and 16 segments of left ventric- ular wall was analyzed. Endocardial border was defined from one to four (one = excellent). Wall motion was evaluated as five grades.Results: Visualization of endocardial border was improved by 57. 2% with NTHI. The grades of wall motion were changed in 12.7% (67/528) segments in the NTHI.Conclusion: NTHI has a significant impact on the endocardial hods definition. Thus the left ventricular wall motion can be evaluated mops easily and accurately in patients with CAD.