Heart patients: when is the best time for stent placement before other surgery?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age ≥18 years * Diagnosis of coronary heart disease with non-emergent indication for PCI confirmed by coronary angiography： * Non-ST-elevation acute coronary syndrome (NSTE-ACS) at low or intermediate ischemic risk * Chronic coronary syndrome (CCS) with one of the following anatomical characteristics (see Appendix 1 for definition): 1. Moderate or severe stenosis of the left main coronary artery 2. Multivessel disease involving the ostium of the left anterior descending artery 3. Three-vessel disease with ≥70% stenosis in each major epicardial vessel * Indication for time-sensitive non-cardiac surgery * Planned non-cardiac surgery under general anesthesia in the following surgical departments: thoracic surgery, gastrointestinal surgery, colorectal surgery, hepatobiliary and pancreatic surgery, or gynecology * For patients with malignant tumors requiring time-sensitive surgery: written informed consent confirming understanding and acceptance that, if randomized to the "PCI-first" group, their tumor surgery will be delayed until 90±14 days after PCI, with acknowledgement of potential risks (e.g., tumor progression, change in resectability) * Ability to understand the study requirements and sign written informed consent in the language provided by the research team Exclusion Criteria: * Age \>80 years * Severe thrombocytopenia (platelet count \<50×10⁹/L) * Cardiogenic shock, severe heart failure (NYHA class IV, Killip class IV, or LVEF ≤35%), malignant arrhythmias (including cardiac arrest, asystole, ventricular fibrillation, or sustained ventricular tachycardia), or other life-threatening conditions requiring resuscitation * Moderate-to-severe valvular heart disease, high-grade atrioventricular block, or other severe cardiac/pulmonary dysfunction incompatible with the planned surgery * Planned surgery with extremely high bleeding risk (e.g., intracranial surgery, spinal surgery, retinal surgery) * Patients with malignant tumors undergoing non-palliative surgery who are in poor general condition, defined as meeting any of the following: 1. Karnofsky performance score \<60 2. Eastern Cooperative Oncology Group (ECOG) performance status \>2 * Disease stage beyond surgical indications or estimated life expectancy \<1 year * Patients requiring emergency or urgent surgery due to critical illness * Severe renal dysfunction: serum creatinine \>442 μmol/L, GFR ≤30 mL/min/1.73 m², or currently on renal replacement therapy * Severe hepatic dysfunction: Child-Pugh class C or higher * Severe uncontrolled systemic infection * Advanced dementia with significant decline in quality of life requiring full-time care and support * Systemic thromboembolic disease (e.g., pulmonary embolism) making surgery unsuitable * Women who are pregnant, breastfeeding, or planning pregnancy during the study period * Severe, uncontrolled comorbid conditions continuously impairing physiological or psychological function * Participation in another clinical study within 3 months prior to enrollment * Any condition judged by the investigator to interfere with participation or study conduct