Rhodiola Rosea for Coronary Microvascular Disease

Inclusion Criteria:

1. Repeated chest pain attacks with typical exertional angina pectoris or resting angina pectoris attacks;

2. Coronary normal or stenosis < 20%;

3. Ischemic depression in ST segment during resting or exercise;

4. Blood flow reserve (CFR) of the anterior descending coronary artery < 2.0;

5. Subjects or their guardians agreed to participate in this study.

Exclusion Criteria:

1. Previous myocardial infarction or PCI or CABG treatment;

2. A history of heart failure or LVEF < 50%;

3. Severe arrhythmia;

4. Myocarditis, Pericardium Disease, Valvular Disease, or Cardiomyopathy;

5. A history of stroke within half a year;

6. Diabetes difficult to control;

7. Refractory hypertension or hypertension accompanied by left ventricular wall thickness > 12 mm;

8. Familial hypercholesterolemia;

9. Takayasu arteritis, Kawasaki disease or coronary artery malformation;

10. Pregnant or nursing, or having the intention to give birth within one year;

11. Hepatic or renal dysfunction;

12. Other diseases which may cause serious risks to patients;

13. Requiring warfarin anticoagulant therapy; Taking potassium channel opener, CCB, ACEI drugs or traditional Chinese medicines;

14. Allergic to contrast agents or blood products;

15. Patients who participated in clinical research of other drugs within 3 months before being selected.