Comparison Of The 2DSTE/2DE Technology In The Left Ventricular Function In Patients With Chronic Heart Failure Clinical Application Value

Objective To explore the relationship among the left ventricular rotation and twist, Tei index and left ventricular function in chronic heart failure patients and provide reliable indicator of chronic heart left ventricular myocardial function and mechanical movement.Methods Selected 79 Patients with chronic heart failure class Ⅱ(32 cases), cardiac function class Ⅲ(26 cases), cardiac function grade Ⅳ(21 cases) and healthy control group(28 cases),all of whom checked by conventional speckle tracking and two dimensional-speckle tracking imaging apical four chambers were collected tissue Doppler mitral annulus, left ventricular apex of the heart and the level of short-axis horizontal two-dimensional image, to measure the left ventricular twist,left ventricular rotation and Tei index and statistical correlation analysis.Results(1) There were significant differences for Tei index among the four group(P<0.01). The Tei index gradually increased when the heart function decreased.(2) The left ventricular twist were also significantly different among the four groups(P<0.01). The left ventricular twist gradually decreased when the heart function decreased. The differences between chronic heart failure patients with cardiac function class Ⅳ and healthy control group, chronic heart failure patients with cardiac function class Ⅱ and class Ⅲ were significant(all P<0.05).(3) The left ventricular twist and Tei index were negatively correlated(P<0.01).(4) The left ventricular segmental rotations at basal level were significantly different among healthy control group and chronic heart failure patients with cardiac function class Ⅱ,Ⅲ and Ⅳ(all P<0.01).(5) The left ventricular segmental rotations at apical level were significantly different among four groups(all P<0.01).(6)The left ventricular segmental rotations were positively correlated with Tei index and the segmental rotation of anterior wall was most correlated with Tei index(all P<0.01). The left ventricular segmental rotations were negatively correlated with Tei index and the segmental rotation of anterior wall was most correlated with Tei index(all P<0.01).Conclusions According to left ventricular function,left ventricular torsion angle, each segment ventricular short axis rotation angle in patients with chronic heart failure gradually decreased,while the Tei index increased. Combination of two-dimensional speckle tracking technology and Tei index could achieve noninvasive assessment of chronic heart failures’ left ventricular mechanical movement and left heart function.