Department of Anaesthesia, St Vincent's Hospital, Melbourne, Australia.
J Cardiothorac Vasc Anesth. 2011 Apr;25(2):216-20. doi: 10.1053/j.jvca.2010.05.011. Epub 2010 Aug 7.
To assess the feasibility and correlation between tissue Doppler and speckle tracking imaging when measuring myocardial velocity, strain, and strain rate with transesophageal echocardiography.
A prospective, observational study.
An academic tertiary-referral hospital.
Patients undergoing elective heart surgery.
None.
Velocity, strain, and strain rate were measured using both techniques in the inferior and anterior walls in transgastric views for radial motion and in the lateral, septal, anterior, and inferior walls in midesophageal views for longitudinal motion. Nineteen patients and 304 myocardial segments were studied. Overall, tissue Doppler was found to be more successful than speckle tracking in measuring myocardial velocity, whereas strain and strain rate measurements were achieved with comparable success using either method. Tissue Doppler was more successful than speckle tracking for radial cardiac motion, and the highest success rates were achieved with this method (93.4% v 59.2% for velocity, p < 0.001; 78.9% v 59.2% for strain, p = 0.01; and 73.7% v 59.2% for strain rate, p = 0.09). Good correlation between tissue Doppler and speckle tracking was shown in 4 myocardial segments: radial midinferior, radial basal inferior, radial basal anterior, and longitudinal basal septum (R = 0.6-0.82, p < 0.05).
The correlation between tissue Doppler and speckle tracking with transesophageal echocardiography appears valid when predominantly confined to segments moving in a radial direction adjacent to the ultrasound transducer. Tissue Doppler echocardiography of radial cardiac motion appears to be the most feasible technique of measuring myocardial velocity, strain, and strain rate during cardiac surgery.
评估经食管超声心动图测量心肌速度、应变和应变速率时组织多普勒和斑点追踪成像的可行性和相关性。
前瞻性观察性研究。
学术三级转诊医院。
接受择期心脏手术的患者。
无。
使用两种技术在经胃视图中测量下壁和前壁的径向运动以及在中食管视图中测量侧壁、间隔、前壁和下壁的纵向运动的心肌速度、应变和应变速率。研究了 19 例患者和 304 个心肌节段。总体而言，组织多普勒在测量心肌速度方面比斑点追踪更成功，而应变和应变速率的测量使用这两种方法均具有相当的成功率。组织多普勒在测量径向心脏运动方面比斑点追踪更成功，且该方法的成功率最高（速度为 93.4%比 59.2%，p < 0.001；应变 78.9%比 59.2%，p = 0.01；应变速率 73.7%比 59.2%，p = 0.09）。在 4 个心肌节段中，组织多普勒和斑点追踪之间显示出良好的相关性：径向中下、径向基底下、径向基底前和纵向基底间隔（R = 0.6-0.82，p < 0.05）。
当主要局限于与超声换能器相邻的径向运动节段时，经食管超声心动图中组织多普勒和斑点追踪之间的相关性似乎是有效的。径向心脏运动的组织多普勒超声心动图似乎是心脏手术期间测量心肌速度、应变和应变速率最可行的技术。
