摘要
目的探讨应变成像技术评价心房颤动（房颤）患者左心房功能的价值。方法对20例正常人、24例阵发性房颤患者与17例持续性房颤患者进行常规超声心动图及应变成像检查，于心尖四腔观测定房间隔和左心房侧壁中段及上段的应变峰值（ε），比较三组间测量结果。结果在正常组，心房上段的ε明显高于中段，且具有较好的稳定性和重复性；同一水平房间隔的应变峰值（ε_s）和左心房侧壁的应变峰值（ε1）差异无统计学意义，心房上段εs、ε1的平均值（εm）可作为评价左心房功能的参数。房颤组的εm明显低于正常组；与阵发性房颤组相比，持续性房颤组的εm更低；而对于左心房前后径尚属于正常范围的阵发性房颤组，其εm也已明显低于正常组。结论应变成像技术能够无创、简单而迅速地评价心房功能，εm是评价心房功能有效而敏感的参数。
Objective To assess the feasibility of strain imaging in assessing left atrial （LA） function in patients with atrial fibrillation （AF）. Methods Echocardiographic evaluation including strain imaging in 4-chamber view was performed in 42 patients with AF（17 with persistent AF and 24 with paroxysmal AF） and in 20 controls. The peak strain（e） at the mid and upper segment of LA lateral wall and atrial septum was measured. Results In control subjects,the peak ε of the upper segment was much higher than that of the mid segment. The in the upper segment had good reproducibility and stability, and there was no significant difference between peak ε in the upper segment of LA lateral wall（ε1） and atrial septum（εs）. The mean valve （εm） of ε1 and εs was used as the parameter for assessing LA function. In AF patients, the εm was significantly decreased than that of normal controls（66.3% ± 30.2% vs 100.2%±23.2%, P〈0.01）. The εm was significantly lower in patients with persistent AF than that with paroxysmal AF（45.3%±21.1% vs 81.1%±26.9%, P〈0.01）. In patients with paroxysmal AF, though LA diameter was not enlarged [（38.6±4.6）mm], the εm was significantly reduced than that of normal controls（81.1%± 26.9% vs 100.2%±23.2%, P〈0.05）. Conclusions Strain imaging may provide a noninvasive,simple and quick tool for evaluation of atrial function. εm is a useful parameter to quantify LA reservoir function.
出处
《中华超声影像学杂志》
CSCD
2008年第1期27-29,共3页
Chinese Journal of Ultrasonography
关键词
超声心动描记术
心房颤动
心房功能
左
Echocardiography
Atiral fibrillation
Atrial function, left
