| 摘要: |
| 目的 采用二维斑点追踪成像技术（2D-STI）对左束支起搏（LBBP）早期左房功能进行评价。 方法 纳入完成永久起搏器植入术的患者共47例，其中LBBP组26例，右室间隔部起搏（RVP）组21例，术后1月随访，另选取20例健康人作为对照组。通过2D-STI分析并计算左房储存功能期应变（LASr）、管道功能期应变（LAScd）和辅泵功能期应变（LASct）、左室总体纵向应变（GLS）和各切面总体纵向应变（GLS-AP2、GLS-AP3、GLS-AP4）用于评价左房、左室功能，计算左室17节段纵向应变达峰时间标准差（Tp-SD）、达峰时间最大差值（Tp-dif）用于评价左室内同步性。 结果 各组左房功能参数比较，LBBP组和RVP组LASr、RVP组LAScd明显降低，差异均有统计学意义（P<0.05）。左室功能分析显示，LBBP组、RVP组GLS-AP2、GLS-AP3、GLS-AP4和GLS均较对照组明显降低，RVP组Tp-SD、Tp-dif较其余两组明显增大，差异均有统计学意义（P<0.05）。LBBP组和RVP组Tp-SD、Tp-dif均与LAScd呈正相关。 结论 采用2D-STI技术可评估左束支起搏术后早期左房功能。与RVP相比，LBBP左室内同步性更好，有利于保护左房管道功能。 |
| 关键词: 左束支起搏 二维斑点追踪成像 应变 同步性 |
| DOI： |
| 投稿时间：2022-07-09修订日期：2022-09-15 |
| 基金项目:四川省卫生健康委员会基金 |
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| Evaluation of Left Atrial Function in Patients with Left Bundle Branch Pacing by Two-dimensional Speckle Tracking Imaging |
| WANG Xiuxiu,XIONG Feng,XU Min,YAN Shuangshuang,XIONG Shiqiang |
| (The affiliated hospital of Southwest Jiaotong University,The Third People’s Hospital of Chengdu) |
| Abstract: |
| Objective To evaluate early left atrial function after left bundle branch pacing (LBBP) by two-dimensional speckle tracking imaging (2D-STI). Methods Fourty-seven patients after pacemaker implantation were rolled in, including 26 cases of LBBP and 21 cases of right ventricular septum pacing (RVP), conventional echocardiography were performed one month after implantation. Twenty healthy persons were enrolled as control group. Left atrial reservoir strain (LASr), left atrial conduit strain (LAScd), left atrial contraction strain (LASct), global longitudinal strain (GLS) and apical two, three and four chamber view global longitudinal strain (GLS-AP2, GLS-AP3, GLS-AP4) were analyzed by 2D-STI to evaluate function of left atrial and ventricular. Standard deviation of time to peak (Tp-SD) and maximum difference of time to peak (Tp-dif) were used to evaluate synchronization of left ventricular. Results Comparison of left atrial function parameters, LASr in patients with LBBP and RVP and LAScd in patients with RVP both decreased with significant differences (P<0.05). Left ventricular function analysis showed that GLS-AP2、GLS-AP3、GLS-AP4 and GLS of LBBP group and RVP group both decreased with significant differences compared with control group. Tp-SD and Tp-dif in RVP increased significantly compared with other groups (P<0.05). Tp-SD and TP-dif of LBBP and RVP group were positively correlated with LAScd. Conclusion 2D-STI technique can be used to evaluate the early left atrial function after left bundle branch pacing. Compared with RVP, LBBP has better left ventricular synchronization, which is conducive to the protection of left atrial conduit function. |
| Key words: left bundle branch pacing two-dimensional speckle tracking imaging strain synchronization |
