Correlation between myocardial infarction activity assessed by cardiac magnetic resonance imaging and the evolution of cardiac function after PCI

Objective: To investigate the correlation of cardiac magnetic resonance imaging (MRI) in the assessment of myocardial activity in patients with myocardial infarction and the outcome of cardiac function after PCI. Methods: 30 patients with myocardial infarction (MI) who had complete clinical and i...

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Bibliographic Details
Main Author: Jiang-Jun Qin
Format: Article
Language:English
Published: Editorial Board of Journal of Hainan Medical University 2020-05-01
Series:Journal of Hainan Medical University
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Online Access:http://www.hnykdxxb.com/PDF/202009/07.pdf
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Summary:Objective: To investigate the correlation of cardiac magnetic resonance imaging (MRI) in the assessment of myocardial activity in patients with myocardial infarction and the outcome of cardiac function after PCI. Methods: 30 patients with myocardial infarction (MI) who had complete clinical and imaging data from July 2016 to December 2018 after PCI were analyzed retrospectively. MR and echocardiogram were performed before and 6 months after PCI, and the parameters related to left ventricular function were measured by postprocessing software of MRI workstation. The left ventricular transmural degree of CMR late gadolinium enhancement was compared with the left ventricular wall motion degree of 6-month echocardiography as a standard to judge the viable myocardium. Result: There were 193 left ventricular segmental abnormalities in 30 cases, including 121 viable myocardium and 72 non viable myocardium in CMR-LGE before operation. Six months after PCI, echocardiography showed that 125 of 193 abnormal segments of left ventricle detected by CMR-LGE before PCI were viable myocardium and 68 were non viable myocaridium.The sensitivity and specificity of CMR-LGE to determinate of viable myocardium were 92.0% and 91.1% respectively. The larger the non-viable myocardial area of the left ventricular wall, the worse the recovery of wall motion ability, and there was a negative correlation between them (r=0.416, P<0.05). The first-pass perfusion time in CMR-LEG region was significantly longer than that in normal myocardial region (4.85 (+) 1.51) s and (3.79 (+) 1.73) s, respectively. The difference was statistically significant (t = 5.191, P < 0.05). Conclusion: MRI can evaluate the myocardial activity of myocardial infarction, reflect the range of viable myocardium, and provide imaging basis for clinical treatment and prognosis.
ISSN:1007-1237
1007-1237