Assessment of Left Atrial Function by Full Volume Real-time Three-dimensional Echocardiography and Left Atrial Tracking in Essential Hypertension Patients with Different Patterns of Left Ventricular Geometric Models

Yang Wang; Lin Gao; Jian-bai Li; Chao Yu

摘要

Objective To evaluate left atrial function in essential hypertension patients with different patterns of left ventricular geometric models by real-time three-dimensional echocardiography (RT-3DE) and left atrial tracking (LAT). Methods One hundred and thirty-three patients with essential hypertension were divided into four groups according to criteria proposed by Ganau et al:36 patients in normal pattern group (I), 34 patients in concentric remodelling pattern group (II), 33 patients in concentric hypertrophy pattern group (III), and 30 patients in eccentric hypertrophy pattern group (IV). Thirty-two healthy volunteers were enrolled in this study. RT-3DE and LAT were used to obtain the volume-time and emptying fraction curves, and then the maximal volume, minimal volume, stroke volume, presystolic volume, ejection fraction, systolic filling rate, early diastolic emptying rate and late diastolic emptying rate of the left atrium were measured. Conduit volume and passive emptying volume of the left atrium were calculated. Results Left atrial indexes, conduit volume, passive emptying volume, and early diastolic emptying rate decreased, while the other indices increased in the group I compared with the control group (all P<0.05). Compared with the control group, I and II groups, the left atrial volume parameters manifested change in the group III and group IV (all P<0.01). Left atrial ejection fraction measured by RT-3DE or LAT, and late diastolic emptying rate were lower in the group IV compared with the group III (all P<0.05). There was no difference in left atrial conduit volume, passive emptying volume, and early diastolic left atrial emptying rate between the group II and group I (all P>0.05). There was a positive correlation between RT-3DE and LAT in evaluating left atrial function. Conclusions Left atrial booster pump function decreases in the eccentric hypertrophy pattern. Left atrial conduit function is unchanged in the normal pattern and the concentric remodelling pattern groups. RT-3DE and LAT technology can be used for quantitative evaluation of left atrial volume and function.

机译：目的通过实时三维超声心动图（RT-3DE）和左心房追踪（LAT）评价具有不同左心室几何模型模式的原发性高血压患者的左心房功能。方法根据Ganau等提出的标准，将133例原发性高血压患者分为四组：正常模式组（I）36例，同心重塑模式组（II）34例，33偏心肥大模式组（III）的患者和偏心肥大模式组（IV）的30例患者。 32名健康志愿者参加了这项研究。使用RT-3DE和LAT来获得体积-时间和排空分数曲线，然后获得最大体积，最小体积，中风体积，收缩前体积，射血分数，收缩期充盈率，舒张早期排空率和舒张晚期排空率。测量左心房。计算左心房的导管体积和被动排空体积。结果与对照组相比，I组左心房指标，导管容量，被动排空量和早期舒张期排空率降低，而其他指标均升高（所有P <0.05）。与对照组，Ⅰ，Ⅱ组相比，Ⅲ，Ⅳ组左心房容积参数均有变化（均P <0.01）。 RT-3DE或LAT测定的左心房射血分数和舒张末期排空率均低于IV组（均P <0.05）。 II组与I组左心房容积，被动排空量，早期舒张期左心室排空率无差异（均P> 0.05）。 RT-3DE与LAT在评估左心房功能方面呈正相关。结论偏心肥大型左房增压泵功能下降。在正常模式和同心重塑模式组中，左心房导管功能未改变。 RT-3DE和LAT技术可用于定量评估左心房容量和功能。

Assessment of Left Atrial Function by Full Volume Real-time Three-dimensional Echocardiography and Left Atrial Tracking in Essential Hypertension Patients with Different Patterns of Left Ventricular Geometric Models

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