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[Clinical value of the evolution of left ventricular global strain in anterior myocardial infarction patients treated with emergency percutaneous coronary intervention].

OBJECTIVE: To investigate the evolution of left ventricular global strain in anterior myocardial infarction patients treated with emergency percutaneous coronary intervention (PCI).
 Methods: A total of 54 patients with PCI were enrolled as a PCI group. Forty healthy subjects were enrolled as a control group. Dynamic cardiac images were collected. All of these images were analyzed off-line by velocity vector imaging (VVI) software. N-terminal pro-B-type natriuretic peptide (NT-proBNP) was measured with an electrochemiluminescence immunoassay through the Elecsys 1010/2010 system. Correlation analysis were undertaken between VVI and NT-proBNP levels in blood.
 Results: In PCI group, only globle longitudinal strain (GLS) was significantly increased 3 day after operation (P<0.05). GLS and globle circumferencial strain (GCS) were markedly increased 6 months after operation (P<0.05). In PCI group, left ventricular GLS 1 d to 6 months after PCI shows positive correlation with lgNT-proBNP levels (r=0.66, P<0.001). GLS value was -12.50% at the 3rd day after operation, indicating the improvment of cardiac function in the first and sixth month after PCI.
 Conclusion: The change of Left ventricular globle longitudinal systolic function after emergency PCI may be more sensitive to the improvement of myocardial stunning after STEMI reperfusion; GLS value (-12.50%) at the 3rd day after operation predict the improvment of cardiac function in the first and sixth months after PCI.

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