定量组织速度成像技术评价老年高血压病患者左室舒张功能的研究

目的应用定量组织速度成像技术(QTVI)对老年高血压病患者的左室舒张功能进行评价。方法应用定量组织速度成像技术测定20例健康老年人(对照组)及22例老年高血压患者(异常组)左室壁各节段的快速充盈期、心房收缩期的心肌运动速度Ve、Va和Ve/Va比值。比较两组间的差异并进行显著性检验。结果高血压组其基底段左室前壁、后壁及下壁Ve低于正常组(P<0.01,P<0.05),基底段后间隔、后壁及下壁Va低于正常组(P<0.05),中间段后间隔、后壁Ve及Va均低于正常组(P<0.05),Ve/Va比值与正常组比较,差异无显著性意义(P>0.05)。结论QTVI可于同一时相对不同的节段心肌进行多点取样,获得局域性心肌运动速度曲线,为评价左室整体和局域性舒张功能提供了新手段。但对于老年高血压患者,根据Ve/Va比值无法评判局域性舒张功能。

Quantitative tissue velocity imaging: Evaluation of left ventricular diastolic function in old patients with hypertension

Purpose To evaluate left ventricular(LV)diastolic function in old patients with hypertention by using quantitative tissue velocity imaging.Methods In 22 old patients with hypertention and 20 old healthy people with similar age and heart rate,we analyzed left ventricular regional wall motion velocity,and the peak velocity of LV regional myocardium during early diastole(Ve),atrial contraction(Va)and Ve/Va ratio with quantitative tissue velocity imaging.Results Compared with old healthy people,old patients with hypertention showed lower diastolic function,lower Ve(early diastolic)of anterior wall,post wall and inferior wall(P<0.01,P<0.05)and Va(late diastolic)of post interventricular septum and posterior wall and inferior wall(P<0.05)in level of mitral valve,and lower Ve and Va of post interventricualr septum and posterior wall in level of papillary muscle(P<0.05),the Ve/Va ratio was not significantly different between two groups(P>0.05).Conclusion QTVI is a rapid,comprehensive,and valuable method to quantitatively assess LV regional diastolic function,but it can not determined regional diastolic function in old patients with hypertention to only based Ve/Va ratio.