Durmaz T, Bayram H, Bayram Na, Sari C, Keles T, Bastug S, Bozkurt E
Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.
Department of Cardiovascular Surgery, Ataturk Education and Research Hospital, Ankara, Turkey
Perfusion. 2014 Sep;29(5):425-33. doi: 10.1177/0267659113513920. Epub 2013 Dec 4.
This study examined the effect of coronary artery revascularization on left ventricular function and the results of strain imaging for the detection of ischemia before and after coronary artery bypass graft (CABG) surgery.
Sixty-eight patients with a history of coronary artery disease (CAD) were included, prospectively. Conventional echocardiography and color tissue Doppler-derived strain-strain rate echocardiographic imaging were performed 24 hours before and 3 months after CABG surgery.
While strain rate values of the basal septum, middle segment of the lateral wall, middle segment of the inferior wall, and middle and basal segments of the anterior wall were significantly increased, other segments did not change after the operation. The mean systolic strain rate value was significantly increased after the operation. Left ventricle strain values in the middle segment of the septum, middle and basal segments of the inferior wall, and middle and basal segments of the anterior wall were significantly increased after the operation. No significant difference was noted in the basal septum or the middle and basal segments of the lateral wall after the operation. The mean systolic strain value was significantly increased after the operation.
The results of this study suggest that strain and strain rate echocardiography can provide an accurate evaluation of regional contractile function after CABG, even in the segments that are apparently normal.
本研究探讨冠状动脉血运重建对左心室功能的影响，以及应变成像在冠状动脉旁路移植术（CABG）手术前后检测心肌缺血的结果。
前瞻性纳入68例有冠状动脉疾病（CAD）病史的患者。在CABG手术前24小时和术后3个月进行常规超声心动图检查以及彩色组织多普勒衍生的应变-应变率超声心动图成像。
术后，室间隔基底段、侧壁中间段、下壁中间段以及前壁中间段和基底段的应变率值显著增加，而其他节段无变化。术后平均收缩期应变率值显著增加。术后，室间隔中间段、下壁中间段和基底段以及前壁中间段和基底段的左心室应变值显著增加。术后，室间隔基底段或侧壁中间段和基底段无显著差异。术后平均收缩期应变值显著增加。
本研究结果表明，应变和应变率超声心动图能够准确评估CABG术后局部收缩功能，即使在看似正常的节段也是如此。
