Speckle tracking imaging evaluation of radial strain and circumferential strain from the left ventricular short-axis views in myocardial ischemia

Objective To quantitatively analyze the characteristics of radial strain and circumferential strain in myocardial ischemia with speckle tracking echocardiography. Methods Fifty-six patients with myocardial ischemia and 31 healthy subjects were enrolled. High frame rate two-dimensional images were recorded from the left ventricular short-axis views at the levels of mitral annulus and papillary muscle. Radial strain and circumferential strain were measured in the left ventricular short-axis views with 2D strain software. Results With the aggravation of coronary stenosis,the peak strain of the corresponding segments decreased gradually,and then increased after PCI. Radial strain and circumferential strain were negatively correlated with the aggravation of coronary stenosis(r=-0.63,P0.01;r=-0.54,P0.01) . Conclusion Regional wall motion of left ventricular in patients with myocardial ischemia can be evaluated accurately with speckle tracking echocardiography.