应变率成像技术评价左心室心肌肥厚病人左心房功能的价值

THE VALUE OF STRAIN RATE IMAGING IN THE ASSESSMENT OF LEFT ATRIAL FUNCTION IN PATIENTS WITH LEFT VENTRICULAR MYOCARDIAL HYPERTROPHY

目的探讨实时三平面应变率成像检测生理性与病理性左心室肥厚者左心房功能的价值。方法选取原发性高血压病人30例、专业运动员25例、正常人30例,应用实时三平面应变率成像定量检测左心房每个壁在收缩期、舒张早期、舒张晚期的峰值应变率并进行比较。结果运动员组与对照组的峰值应变率相近,差异无统计学意义(P>0.05),而高血压组峰值应变率明显下降(F=29.54～35.03,q=11.52～19.74,P<0.05)。结论实时三平面应变率成像能够敏感地反映高血压早期左心房功能的改变,对于全面评价原发性高血压与生理性左心室心肌肥厚者左心房功能有重要作用。

Objective To investigate the value of real-time tri-plane strain rate imaging in detection of left atrial function in those with physiologic and pathologic left ventricular hypertrophy. Methods Thirty patients with primary hypertension, 25 professional athletes, and 30 normal individuals were enrolled in this study. By using real-time tri-plane strain rate imaging technique, the strain rate peak values of each LA wall in systole period, early diastole and late diastole were detected and compared. Results The peak strain rate in the athletes and normal controls was close to each other, the difference between them was not significant （P〈0.05）, and in hypertension group, the peak strain rate declined obviously （F=29. 54-35. 03, q= 11.52-10.74, P〈 0.05）. Conclusion Real-time tri-plane strain rate imaging technique can sensitively reflect the changes of left atrial function in early hypertension, which is of important role in overall assessment of left atrial function due to left ventricular hypertrophy caused by primary hypertension or physiologic reason.