速度向量成像技术对高血压患者左室不同层次心肌应变率的研究  被引量:6

Evaluation of Strain Rate in Different Layers of Left Ventricular Myocardium in Hypertensive Individuals Using Velocity Vector Imaging

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作  者:郝晓晔[1] 李治安[2] 杨娅[2] 刘望彭[1] 

机构地区:[1]山西医科大学,太原030001 [2]首都医科大学附属北京安贞医院超声诊断科,北京100029

出  处:《中国现代医生》2009年第15期1-3,32,共4页China Modern Doctor

摘  要:目的应用速度向量成像(VVI)技术评价正常人和原发性高血压患者的左室心内膜下心肌及心外膜下心肌的收缩期周向应变率差异。方法获取22例正常人和39例高血压患者行常规二维超声心动图检查后,在VVI条件下采集左室短轴乳头肌水平二维图像,依据左室心肌质量指数(LVMI)将39例原发性高血压患者分为两组:左室肥厚组18例(LVH,LVMI男≥134g/m2,女≥110g/m2);无左室肥厚组21例(NLVH,LVMI男<134g/m2,女<110g/m2)。应用VVI脱机分析软件测量6个节段心内膜下、心外膜下心肌的收缩期周向峰值应变率(SRendo、SRepi)。结果高血压组和正常对照组各组各节段的SRendo均大于SRep(iP<0.01);高血压左室肥厚组室间隔的SRendo低于正常对照组和高血压无左室肥厚组,且低于高血压左室肥厚组其他节段(P<0.05),而正常对照组和高血压无左室肥厚组各节段SRendo均无明显差异;三组间及各组内SRepi无统计学差异(P>0.05)。结论VVI技术可对左室局部收缩功能进行定量评价,不同层次心肌的收缩期周向应变率存在差异。Objective To evaluate strain rate(SR) in different layers of left ventricular myocardium of normal people and essential hypertension patients with different patterns of left ventrieular geometric models using velocity vector imaging(VVI). Methods SR data were obtained from the left mid ventricular short-axis view in 22 healthy people and 39 patients with essential hypertension using VVI,18 patients with left ventrieular hypertrophy(LVH) and 21 patients who had no left ventricular hypertrophy(NLVH). The segmental systolic peak SR(SRs) in the endocardial(SRendo), epieardial(SRepi) layers were analyzed by offline software. Results The circumferential SR decreased significantly from the endocardium to the epieardium in the hypertension group and in the control group. SRendo of interventricular septum in LVH group was lower than in NLVH group and normal group. SRepi appeared no difference in three groups and six segmentals of every group. Conclusion VVI is useful in evaluating regional myocardial function of systolic. Strain rate is different between endocardial and epicardial layer of the myocardium in the mid short-axis view.

关 键 词:速度向量成像技术 应变率 高血压 

分 类 号:R544.1[医药卫生—心血管疾病]

 

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