Evaluation of left ventricular global systolic function with two -dimensional speckle tracking imaging in stunned myocardium of beagle dogs
SUN Peng-tao
HUANG Bo-xiang
CHEN Qi-cheng
YANG Le-ping
SHEN Qiang
Abstract：Objective To investigative delayed relaxation of left ventricle globe systolic function in stunned myo -cardium by detection of mitral annular displacement (MAD) with two -dimensional speckle tracking imaging .Methods Eighteen open -chest beagle dogs were divided into 3 groups: short time stunned group, long time stunned group and sham operation group.The acute myocardium ischemia was induced by ligating left anterior descending coronary artery for 15 (short time stunned group) or 45(long time stunned group) min.Two -dimensional imaging were obtained at the api -cal four -chamber view before ischemia, and 15 min and 45 min after ischemia, as well as 10, 30, 60 and 90 min after reperfusion.The parameters of MAD were obtained use off -line QLAB software.Results Compared with baseline and with sham operation group, EMAD1, EMAD2, EMADm and EMADm% in long time stunned group were significantly re -duced.Compared with baseline and with sham operation group , EMAD2, EMADm and EMADm% in short time stunned group were also significantly reduced.Compared with short time stunned group , EMAD1 in long time stunned group at the 90 min of reperfusion was significantly reduced .Conclusion Based on two -dimensional speckle tracking imaging , MAD is an accurate and rapid method determining delayed relaxation of LV global systolic function in stunned myocardium .
Keywords：speckle trackingmitral annular displacementleft ventriclesystolic functionstunned myocardium
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 39-42 )