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| Application of speckle tracking imaging in evaluating left ventricular rotation and torsion inpatients with acute myocardial infarction |
| DENG Yu-jiao, XIA Dao-zi, YANG Bing-bing, LI Yang, XUAN Jian-yuan |
| Department of Ultrasound, Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China |
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Abstract Objective: To evaluate the value of speckle tracking imaging(STI) in detecting left ventricular(LV) rotation and torsion after percutaneous coronary intervention(PCI) in acute myocardial infarction patients with non ST-segment elevation(NSTEAMI) and with ST-segment elevation(STEAMI) NSTEAMI and STEAMI using STI． Methods: Nineteen patients with NSTEAMI(group A) and 31 patients with STEAMI(group B)， who had acute myocardial infarction(AMI) for the first time and have been treated by PCI， were enrolled in this study． High frame rate two-dimensional images were collected from LV short views at the basal level and the apical level， and the parameters of rotation and torsion were calculated using STI in those patients at one week and three months after PCI． So were the 27 normal controls(group C)． Results: The apex was counterclockwise movement and rotation value was positive， and the base was clockwise movement and rotation value was negative in group A， B and C． Compared with group C， the values of apical rotation， basal rotation and LV twist were decreased in group A and STEAMI group at one week after PCI(P<0.05)， especially in group B． Those parameters were increased in group A and B at three months after PCI， and the apical rotation in part of segments was significantly improved in group A compared with one week after PCI(P<0.05)． Conclusion: The rotation of apex and base and LV twist were severely damaged in patients with different transmural extent of myocardial necrosis． There are significant improvements of those parameters in group A than that in group B after PCI for a long time．
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Received: 11 November 2013
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2014, Vol. 25 
