Abstract: ¹⁸F-fluorodeoxyglucose (FDG) PET/MRI imaging of viable myocardium has always been concerned by clinicians, especially cardiologists. Both PET and MRI can play a unique value in the diagnosis and prognosis of ischemic cardiomyopathy. Integrated PET/MRI equipment provides a new platform for exploring its integrated value. By reviewing the pathophysiology of ischemic cardiomyopathy, the characteristics of PET myocardial imaging and the clinical application of MRI, and combing the research progress in related fields in the past ten years, the author reviews the characteristics and clinical value of PET/MRI viable myocardial imaging, so as to provide reference for the clinical scientific research of PET/MRI viable myocardial imaging.