Di Salvo Giovanni, Pacileo Giuseppe, Caso Pio, Verrengia Marina, Rea Alessandra, Santoro Giuseppe, Giovanna Russo Maria, Calabro Raffaele
Physiopathology of the Cardio-Respiratory System and Associated Biotechnologies, Division of Pediatric Cardiology, Second University of Naples-Monaldi Hospital, Italy.
J Am Soc Echocardiogr. 2005 May;18(5):398-400. doi: 10.1016/j.echo.2004.09.009.
To compare the value of strain and strain rate imaging in assessing regional myocardial function to that of myocardial velocities, we studied 10 patients late after successful percutaneous atrial septal defect closure. Analysis was performed for atrial longitudinal peak systolic velocity, strain, and strain rate from the midsegment of interatrial septum, in correspondence of the device, and from the lateral left atrial wall. Placing the sample volume in the middle part of the atrial septal defect occluder, a bulky noncontractile element, passively moved by global heart motion, the new ultrasonic-derived myocardial deformation indexes demonstrated almost the absence of any deformations, whereas myocardial velocities failed to significantly discriminate between this noncontracting structure and the normal atrial wall.
为了比较应变和应变率成像在评估局部心肌功能方面与心肌速度成像的价值，我们研究了10例经皮房间隔缺损封堵成功后晚期的患者。对房间隔中段、封堵器对应部位以及左心房侧壁的心房纵向收缩期峰值速度、应变和应变率进行了分析。将取样容积置于房间隔缺损封堵器的中部，这是一个体积较大的无收缩功能的元件，随整体心脏运动被动移动，新的超声衍生心肌变形指标显示几乎没有任何变形，而心肌速度未能显著区分这种无收缩结构和正常心房壁。
