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Three‐Dimensional Speckle Tracking Echocardiography for the Evaluation of the Infarct Size and Segmental Transmural Involvement in Patients with Acute Myocardial Infarction
Author(s) -
Zhu Wenhui,
Liu Wengang,
Tong Yan,
Xiao Jidong
Publication year - 2014
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/echo.12284
Subject(s) - ejection fraction , cardiology , medicine , myocardial infarction , ventricle , radial stress , speckle tracking echocardiography , magnetic resonance imaging , infarction , heart failure , radiology , deformation (meteorology) , physics , meteorology
Purpose To compare parameters between three‐dimensional speckle tracking echocardiography (3D STE ) and delayed enhancement magnetic resonance imaging ( DE ‐ MRI ) for estimating myocardial infarct size, peak systolic strain, and transmural involvement of infarct segments in patients with acute myocardial infarction ( AMI ). Methods Delayed enhancement MRI was conducted to determine myocardial infarction ( MI ) position, size, and transmural involvement in 26 patients with AMI . 3D STE was conducted to measure global peak systolic strain in the left ventricle and to estimate longitudinal, circumferential, and radial peak systolic strain in papillary muscle segments. Conventional echocardiography was used to calculate the wall‐motion score index ( WMSI ) and left ventricular ejection fraction ( LVEF ). Results Left ventricular strain parameters and LVEF were statistically significantly lower in patients with large‐size MI than in those with small‐size MI . Global longitudinal strain ( GLS ) and global circumferential strain ( GCS ) were significantly lower in patients with moderate‐size MIs than in those with small‐size MI s. All parameters except ejection fraction ( EF ) were lower in patients with large‐size MI compared with those with moderate‐size MI (P < 0.05). Pearson analysis revealed that left ventricular GCS , GLS , GRS , WMSI , and LVEF of AMI patients correlated with the myocardial infarct area ( MIA ) measured by MRI (r = 0.86, 0.81, −0.71, 0.64, and −0.66, respectively; all P‐values <0.01). Transmural infarct segments exhibited significantly lower longitudinal, circumferential, and radial strains than normal segments (P < 0.05). Conclusions These findings indicate that 3D STE can distinguish between MI s of different infarct sizes, and may provide an indirect means for the accurate determination of transmural involvement in infarct segments.