An Imaging Study of Polyvascular Disease

Task 1:

1. Patients with coronary artery disease (≥50% stenosis in any coronary artery on coronary angiography)
2. Age ≥18 years old
3. Proposed OCT-IVUS integrated imaging system
4. able to provide written informed consent prior to the start of any procedures related to the study.

Task 2:

1. patients with coronary artery disease (coronary angiography reveals ≥50% degree of stenosis in any coronary artery) and patients with stroke or TIA (confirmed by a neurologist)
2. Age ≥ 18 years
3. able to provide written informed consent prior to the start of any procedures related to the study.

Exclusion Criteria:

Task 1:

1. severely tortuous/calcified coronary arteries with anticipated difficulty in completing the OCT-IVUS integrated imaging system
2. uncontrolled congestive heart failure or acute left heart failure;plan
3. claustrophobia;
4. left main stem occlusion;
5. proposed coronary artery bypass grafting (CABG);
6. uncontrolled severe ventricular arrhythmia;
7. active bleeding or severe bleeding tendency;
8. acute stroke;
9. patients with hemodynamic instability or unstable cardiac electrical activity (including shock) ;
10. severe renal insufficiency and/or anuria, except in cases where dialysis treatment has been planned;
11. contraindications to the application of contrast media;
12. patients who are severely uncooperative due to psychiatric or serious systemic illness;
13. Patients who, in the opinion of the investigator, are unsuitable for participation in the study.

Task 2:

1. patients who are unable to comply with the follow-up schedule;
2. uncontrolled congestive heart failure or acute left heart failure;
3. patients with a life expectancy of less than 6 months;
4. left main stem occlusion;
5. proposed coronary artery bypass grafting (CABG);
6. uncontrolled severe ventricular arrhythmia;
7. active bleeding or severe bleeding tendency;
8. patients with hemodynamic instability or unstable cardiac electrical activity (including shock) ;
9. severe renal insufficiency and/or anuria, except in cases where dialysis treatment has been planned;
10. contraindications to the application of contrast media;
11. patients who are severely uncooperative due to psychiatric or serious systemic illness;
12. patients who, in the opinion of the investigator, are not suitable for participation in the study.