Application of Two-dimensional Speckle Tracking in Coronary Heart Disease Diagnosis

JIANG Xiao-min

doi:10.3969/j.issn.1004-5775.2015.01.004

Abstract：Objective To investigate the diagnostic value of speckle tracking imaging (STI),which was used to exam the conjecturing accuracy for coronary heart disease diagnosis and the conjecturing accuracy for the related stenotic coronary artery and related stenosis blood vessel diagnosis, against CAG(coronary angiography).Methods According the results of selective coronarography , 390 cases with suspec-ted coronary heart disease ( CHD ) were divided into four groups according to the max coronary stenosis extent : stenosisextent ( 50% ~75%),stenosisextent(76%~98%), stenosisextent(99%~100%) and normal group ( <50%).They were examined with STI, CAG and routine echocardiography at the same period.The data of routine echocardiography was got , and the date was statistically analyzed.According to the abnormal segmentation of ventricle wall motion , the number of CHD and the number of stenosed coronary arteries were got.With CAG as a standard , the different groups′conjecturing sensitivity and conjecturing specificity of the patients was got , and the stenosed coronary arteries, the conjecturing sensitivity and specificity was statistically analyzed.Results (1) LVDD and LVEF were different be-tween the normal group and the group of stenosisextent ( 99%~100%) respectably.The difference had statistics significance.E/A and LVSD did not have significant difference among the groups.(2)The conjecturing sensitivity for the related patients by speckle tracking ima-ging(STI) was comparatively high,when the coronary arteries were stenosed >75% or severely stenosed.The sensitivity was not so high when the arteries stenosed <75%.(3)The conjecturing sensitivity for detecting 230 cases whose max stenosed artery was >75%with STI in one, two and three-vessel CAD subgroups were 84.2%, 87.5%and 100%respectively.There was significant difference among them.(4) Among the groups of different stenosed coronary arteries ,there weren′t statistical significance of differences of the conjecturing sensitivi-ty, specificity and accuracy.(5)The correlation between regional wall motion abnormality and vascular distribution was consist with Ameri -can Society of Echocardiography.Conclusion STI can be applied in the early diagnosis of CHD.Its testing sensitivity is higher than the routine echocardiography remarkably.The sensitivity of conjecturing single patient is very high for evaluating the patients of CHD with se -verely stenosed coronary arteries.STI provides an accurate method for the clinical diagnosis of CHD.