To Evaluate Whether IVUS-guided Drug-eluting Stent (DES) Implantation Leads to Better Clinical Outcomes Compared to Conventional Angiography in the Treatment of Chronic Complete Occlusion (CTO) Disease.

Exclusion Criteria

• •1. Pregnant and lactating women
• •2. Severe coronary artery disease, not suitable for PCI
• •3. Patients with acute myocardial infarction less than 7 days
• •4. Long-term contraindications to DAPT (at least 1 year)
• •5. Known renal insufficiency.20 mL/min / 1.73 ㎡)
• •6. Left ventricular ejection fraction \<35% or cardiogenic shock
• •7. The ICD implanted/CRT
• •8. Severe bleeding or stroke within 6 months
• •9. Have a history of allergy to iodine contrast agents or any known allergy to clopidogrel, ticagrelor, aspirin, or heparin
• •10. Subjects have been diagnosed or suspected of liver disease, including laboratory evidence of hepatitis
• •11. Valvular heart disease significantly affecting hemodynamics, hypertrophic cardiomyopathy, restrictive cardiomyopathy, or congenital heart disease
• •12. Diseases that researchers believe may seriously harm patients, such as cancer and mental illness;Or the patient's life expectancy is less than one year and the follow-up cannot be completed;Or other conditions that researchers think might have confounded the results
• •13. Participate in any other ongoing trial or intend to participate in another clinical trial of a drug or device within 12 months after baseline surgery
• •1. The target lesion is located in the left main artery
• •2. No visible collateral circulation in CTO lesions
• •3. Target lesion is venous or arterial bypass graft
• •4. The target vessel occlusion time (TIMI grade 0) \< 3 months can be determined