A Clinical Study of Evaluating Myocardial Viability in Ischemic Heart Disease with Integrated 18F-FDG PET/MR

Inclusion Criteria:

1. Adults under the age of 80

2. Coronary angiography shows coronary artery disease, with at least 2 coronaryarteries having a degree of stenosis greater than 80%

3. ft ventricular ejection fraction (LVEF)<40%

4. Acute myocardial infarction onset for at least 3 months

5. Patients with old myocardial infarction with no acute coronary artery events in thepast 3 months

6. Patients of pre implementation of coronary artery bypass grafting (CABG) or combinedtreatment with human umbilical cord mesenchymal stem cells (iPSC)

7. Agree to participate in this clinical trial and sign an informed consent form

8. Good compliance

Exclusion Criteria:

• 1.Patients with diabetes or other patients with poor blood glucose control (fastingblood glucose value on the test day is greater than 10mmol/L) 2.Patients who allergyto MR contrast agent 3.Electronic implants such as pacemakers, nerve stimulators,insulin pumps, cochlear implants 4.Patients who have undergone aneurysm surgery andhave intracranial aneurysm clips 5.Patients who have undergone heart surgery andhave an artificial heart valve 6.Patients with metal foreign objects in the eyes 7.Patients with metal implants and prostheses, or metal foreign bodies in otherparts of body 8.Severe liver and kidney dysfunction 9.Accompanied by arrhythmia suchas atrial fibrillation, cerebrovascular disease, and severe pulmonary heart disease 10.Pregnant or plan to pregnant within three months or lactating women 11.Criticallyill patients who require the use of life support systems 12.Patients withclaustrophobia 13.Other situations which clinical trial personnel deem itinappropriate to participate in this trial