Background Left atrial enlargement has been suggested as a more robust marker of diastolic dysfunction. We hypothesize that the ratio of left atrial volume to left ventricular volume （LAV/LVV） may be more reasonable...Background Left atrial enlargement has been suggested as a more robust marker of diastolic dysfunction. We hypothesize that the ratio of left atrial volume to left ventricular volume （LAV/LVV） may be more reasonable to reflect left atrial enlargement in the patients with hypertension, because hypertensive patients have a characteristic of concentric remodeling of the left ventricle which is often accompanied with diastolic dysfunction. The aim of this study was to determine if the LAV/LVV can be used as a new parameter to assess left atrial size in hypertensive patients and the relationship between the LAV/LVV and diastolic dysfunction. Methods Ninety-one patients with hypertension and forty-three normal controls were studied. The hypertensive patients were assigned to the normal wall （NW） and hypertrophic wall （HW） groups. The left atrial diameter （LAD）, LAV, left atrial volume index （LAVi）, LVV and LAV/LVV were measured and calculated by 2-dimensional echocardiography and real time 3-dimensional echocardiography. All of the above parameters were used to evaluate the size of the left atrium. The ratio of peak E velocity of mitral valve inflow to peak E＇ velocity of lateral mitral annulus （E/E＇） was measured by pulse Doppler and tissue Doppler. This parameter was used to evaluate diastolic function. Results The LAD, LAV, LAVi, LAV/LVV and E/E＇ in hypertensive groups were significantly higher than those in the normal group （P 〈0.05 or 0.01）, and those in the HW group were significantly higher than those in the NW group （P 〈0.05 or 0.01）. The E/E＇ had a positive correlation with LAV, LAVi and LAV/LVV. The correlation coefficient between E/E＇ and LAV/LVV was relatively higher than that between E/E＇ and LAD or LAVi. Conclusion LAV/LVV may be used as a new index to evaluate left atrial size in hypertensive patients with diastolic dysfunction.展开更多
目的探讨四维左心房自动定量(4D Auto LAQ)技术对非选择性连续患者左心房的容积及功能的应用价值。方法187例入选患者中成功分析143例患者。应用4D Auto LAQ技术及Simpson’s双平面技术分别获取左房整体射血分数(LAEF)、左房最大容积指...目的探讨四维左心房自动定量(4D Auto LAQ)技术对非选择性连续患者左心房的容积及功能的应用价值。方法187例入选患者中成功分析143例患者。应用4D Auto LAQ技术及Simpson’s双平面技术分别获取左房整体射血分数(LAEF)、左房最大容积指数(LAVImax)、左心房舒张末期容积(LAVmax)、左心房收缩末期容积(LAVmin),同时记录分析时间,比较2种技术所测参数的准确性及可重复性。结果4D Auto LAQ技术及Simpson’s双平面技术所测值相关性高(r值:LAVmax 0.91,LAVmin 0.89,LAVI0.90,LAEF 0.54;P<0.01)、一致性较好[平均测量差异:LAVmax10.1 mL,LAVmin 3.1 mL,LAVI 6.4 mL,LAEF 10.0%;一致性区间:LAVmax(-30.7-50.9)mL,LAVmin(-32.2-38.4)mL,LAVI(-21.2-34.1)mL,LAEF(-19.8-39.8)%]。4D Auto LAQ技术对不同心动周期各测量值相关性好(r值:LAVmax 0.99,LAVmin 0.98,LAVImax 0.99,LAEF 0.92;P<0.01),一致性区间为[LAVmax(-8.9-7.9)mL,LAVmin(-7.9-10.8)mL,LAVI(-7.9-10.8)mL/m2,LAEF(-14.8-9.1)%]。4D Auto LAQ技术各测量值在观察者内部、观察者间的重复性均较好(组内相关系数均>0.8,变异系数均<10%),且优于Simpson’s双平面法。4D Auto LAQ技术技术用时较Simpson’s双平面法明显减少,分别为(30.87±5.05)s、(60.20±5.05)s,(P<0.05)。结论4D Auto LAQ技术评价左心房容积及功能用时更短,重复性好,具有临床推广价值。展开更多
文摘Background Left atrial enlargement has been suggested as a more robust marker of diastolic dysfunction. We hypothesize that the ratio of left atrial volume to left ventricular volume （LAV/LVV） may be more reasonable to reflect left atrial enlargement in the patients with hypertension, because hypertensive patients have a characteristic of concentric remodeling of the left ventricle which is often accompanied with diastolic dysfunction. The aim of this study was to determine if the LAV/LVV can be used as a new parameter to assess left atrial size in hypertensive patients and the relationship between the LAV/LVV and diastolic dysfunction. Methods Ninety-one patients with hypertension and forty-three normal controls were studied. The hypertensive patients were assigned to the normal wall （NW） and hypertrophic wall （HW） groups. The left atrial diameter （LAD）, LAV, left atrial volume index （LAVi）, LVV and LAV/LVV were measured and calculated by 2-dimensional echocardiography and real time 3-dimensional echocardiography. All of the above parameters were used to evaluate the size of the left atrium. The ratio of peak E velocity of mitral valve inflow to peak E＇ velocity of lateral mitral annulus （E/E＇） was measured by pulse Doppler and tissue Doppler. This parameter was used to evaluate diastolic function. Results The LAD, LAV, LAVi, LAV/LVV and E/E＇ in hypertensive groups were significantly higher than those in the normal group （P 〈0.05 or 0.01）, and those in the HW group were significantly higher than those in the NW group （P 〈0.05 or 0.01）. The E/E＇ had a positive correlation with LAV, LAVi and LAV/LVV. The correlation coefficient between E/E＇ and LAV/LVV was relatively higher than that between E/E＇ and LAD or LAVi. Conclusion LAV/LVV may be used as a new index to evaluate left atrial size in hypertensive patients with diastolic dysfunction.
文摘目的探讨四维左心房自动定量(4D Auto LAQ)技术对非选择性连续患者左心房的容积及功能的应用价值。方法187例入选患者中成功分析143例患者。应用4D Auto LAQ技术及Simpson’s双平面技术分别获取左房整体射血分数(LAEF)、左房最大容积指数(LAVImax)、左心房舒张末期容积(LAVmax)、左心房收缩末期容积(LAVmin),同时记录分析时间,比较2种技术所测参数的准确性及可重复性。结果4D Auto LAQ技术及Simpson’s双平面技术所测值相关性高(r值:LAVmax 0.91,LAVmin 0.89,LAVI0.90,LAEF 0.54;P<0.01)、一致性较好[平均测量差异:LAVmax10.1 mL,LAVmin 3.1 mL,LAVI 6.4 mL,LAEF 10.0%;一致性区间:LAVmax(-30.7-50.9)mL,LAVmin(-32.2-38.4)mL,LAVI(-21.2-34.1)mL,LAEF(-19.8-39.8)%]。4D Auto LAQ技术对不同心动周期各测量值相关性好(r值:LAVmax 0.99,LAVmin 0.98,LAVImax 0.99,LAEF 0.92;P<0.01),一致性区间为[LAVmax(-8.9-7.9)mL,LAVmin(-7.9-10.8)mL,LAVI(-7.9-10.8)mL/m2,LAEF(-14.8-9.1)%]。4D Auto LAQ技术各测量值在观察者内部、观察者间的重复性均较好(组内相关系数均>0.8,变异系数均<10%),且优于Simpson’s双平面法。4D Auto LAQ技术技术用时较Simpson’s双平面法明显减少,分别为(30.87±5.05)s、(60.20±5.05)s,(P<0.05)。结论4D Auto LAQ技术评价左心房容积及功能用时更短,重复性好,具有临床推广价值。
