Abstract:Objective To evaluate the recovery of cardiac function by 3.0T cine-magnetic resonance imaging (cine-MRI) and late gadolinium enhancement (LGE) assessing viable myocardium in patients with chronic total occlusion(CTO) after percutaneous coronary intervention (PCI). Methods A total of 32 consecutive patients with CTO treated from December 2017 to December 2019 were selected and received cine-MRI before and 6 months after PCI to evaluate cardiac structure and function,myocardial scar,myocardial activity and other indicators.The changes of relevant indicators were observed and compared before and after PCI. Results After CTO-PCI,left ventricular ejection fraction (LVEF),left ventricular end diastolic diameter (LVEDD),left ventricular end systolic volume (LVESV) and left ventricular end diastolic volume (LVEDV) were improved compared with those before operation,but there were no significant differences (P>0.05).The delayed-enhancement score was not obviously improved after PCI (P>0.05).The left ventricular wall motion score after PCI was significantly better than that before PCI (59.76 ± 6.95 vs 65.23 ± 7.24,P<0.01). Conclusion Detection of viable myocardium by 3.0T cine-MRI before CTO-PCI can provide an important reference for clinical prognosis assessment,and the local ventricular wall motion can be significantly improved in patients with non-transmural delayed-enhancement(transmural extent<50%).