自动功能成像技术评价左室射血分数正常房颤患者的左室收缩功能

目的:应用自动功能成像(AFI)技术探究左室射血分数(LVEF)正常的房颤(AF)患者的左室收缩功能。方法:LVEF正常的AF组和对照组各30例,超声测量左房内径(LAd)、左室舒张末期内径(LVEDd)、左室收缩末期内径(LVESd)、LVEF,AFI自动描记左室各平面整体收缩期应变均值(GLPS-LAX、GLPS-A4C、GLPS-A2C)、左室整体收缩期应变均值(GLPS-AVG),并进行对比分析。结果:LVEF正常AF组患者的年龄、心率、LAd、LVEDd、LVESd均高于对照组(P<0.05),而LVEF与对照组比较无明显差异。LVEF正常AF组GLPS-LAX、GLPS-A4C、GLPS-A2C、GLPS-AVG均明显低于对照组(P<0.05)。结论:AF患者虽然LVEF正常,但其左室心肌节段收缩功能和整体收缩功能已经减低,AFI可早期快速定量评价AF患者的左室收缩功能,为临床提供有价值的信息。

Assessment of left ventricular systolic function in patients with atrial fibrillation and normal left ventricular ejection fraction by automated function imaging

Objective:To explore the left ventricular systolic function in patients with atrial fibrillation(AF)and normal left ventricular ejection fraction(LVEF)using automated function imaging(AFI).Methods:Thirty patients with AF and normal LVEF were enrolled as AF group and thirty matched subjects as control group,left atrial diameter(LAd),left ventricular end-diastolic diameter(LVEDd),left ventricular end-systolic diameter(LVESd),LVEF were measured.The left ventricular strain of(GLPS-LAX,GLPS-A4C,GLPS-A2C)and average strain(GLPS-AVG)were acquired by AFI function.Results:General ultrasound:age,heart rate,LAD,LVEDd,LVESd were higher in the AF group than those in the control group(P<0.05),while there was no significant difference of LVEF between the two groups.GLEF-LAX,GLPS-A4C,GLPS-A2C and GLPS-AVG in the AF group were significantly lower than those in the control group(P<0.05).Conclusion:Although the LVEF is normal in patients with AF,the left ventricular myocardial segment systolic function and overall systolic function have been reduced.AFI function can evaluate left ventricular systolic function in patients with AF quickly and quantitatively and provide valuable clinical information.