Stent surgery

Stent Surgery: The Logic of Minimally Invasive Interventional Treatment for Coronary Artery Disease and Recommendations for Authoritative Hospitals

In the modern treatment system for coronary artery disease (CAD), stent surgery (officially known as coronary artery stenting) is a core method alongside coronary artery bypass grafting (CABG). With “minimally invasive intervention” as its core logic, it implants a stent into the blocked blood vessel through catheter technology to dilate the narrowed or occluded coronary artery, rapidly restoring myocardial blood supply. As one of the most widely used CAD treatment technologies globally, understanding its therapeutic logic and selecting an authoritative medical institution are crucial to ensuring treatment outcomes.

I. Core Logic Analysis of Stent Surgery

The essence of stent surgery is “intravascular stenosis dilation and reconstruction,” with its logical system centered on “minimally invasive, precise, and rapid revascularization,” covering the entire process of preoperative evaluation, intraoperative operation, and postoperative management.

(I) Surgical Decision-Making Logic: Why Choose Stents Over Bypass Grafting or Medication?

The core issue of CAD is vascular stenosis caused by coronary atherosclerosis. The decision-making for stent surgery follows the principle of “lesion characteristic adaptation”:

• Stent surgery is the first choice when patients present with focal stenosis of single or double vessels (stenosis rate ≥ 70%), acute myocardial infarction (AMI, requiring emergency vascular recanalization), stenosis of bypass grafts after CABG, or when patients are elderly or physically weak and unable to tolerate open-chest bypass surgery. This is because stent surgery is minimally invasive with quick recovery, capable of opening blocked vessels in a short time—especially suitable for emergency scenarios in AMI patients. Implanting a stent within 12 hours of onset can significantly reduce mortality.
• From the perspective of risk-benefit ratio, the perioperative mortality rate of stent surgery is only 0.3%-1%, much lower than that of traditional bypass surgery. Patients can get out of bed 1-2 days after surgery and be discharged in about 1 week, with minimal impact on daily life. However, for complex cases such as diffuse multi-vessel lesions, severe left main coronary artery disease (stenosis > 50%), or combined diabetes mellitus, bypass surgery has better long-term patency, requiring comprehensive evaluation by physicians for decision-making.

(II) Intraoperative Implementation Logic: Four Key Links of “Minimally Invasive Recanalization”

1. Preoperative Evaluation Logic: Accurate lesion localization is the prerequisite. Physicians need to clarify the location, degree, length, and diameter of vascular stenosis through coronary angiography (the gold standard). Combined with electrocardiogram, echocardiography, liver and kidney function, and other examination results, they determine the suitability for stent implantation and select a matching stent type (e.g., drug-eluting stents, bioresorbable vascular scaffolds).
2. Puncture and Catheter Placement Logic: Minimally invasive access is the core. The surgery usually selects the femoral artery or radial artery as the puncture site. After local anesthesia, a channel is established with a puncture needle, and a slender catheter is guided along the blood vessel to the opening of the coronary artery. The logic here is to “use the body’s natural blood vessels as pathways,” avoiding open-chest trauma and leaving only a 2-3 mm wound at the puncture site.
3. Core Logic of Stent Implantation: “Dilation – Support – Prevention of Restenosis.” First, a balloon is delivered to the stenotic site via the catheter and inflated with high-pressure gas to dilate the narrowed vascular wall. Subsequently, the stent pre-mounted on the balloon is expanded simultaneously. The stent remains permanently in the blood vessel, supporting the vascular wall like a “scaffold” to maintain patency. Most modern stents are drug-eluting stents, coated with antiproliferative drugs that are slowly released to inhibit excessive proliferation of vascular endothelium, reducing the postoperative restenosis rate from 20%-30% (for bare-metal stents) to below 5%.
4. Immediate Postoperative Evaluation Logic: Ensuring patency is critical. After stent implantation, physicians perform coronary angiography again to check if vascular stenosis is completely resolved (residual stenosis % is considered up to standard). Meanwhile, intravascular ultrasound (IVUS) or optical coherence tomography (OCT) is used to assess stent apposition, preventing complications such as stent displacement and vascular dissection.

(III) Postoperative Management Logic: “Long-Term Maintenance” to Prevent Restenosis

The success of stent surgery is not the end; the core logic of long-term postoperative management is “preventing thrombosis + controlling risk factors”:

• Medication Logic: Long-term antiplatelet therapy is required postoperatively—dual antiplatelet therapy (aspirin + clopidogrel/ticagrelor) for at least 1 year, followed by lifelong aspirin to prevent in-stent thrombosis. Simultaneously, statins (e.g., atorvastatin, rosuvastatin) are administered to stabilize atherosclerotic plaques and control blood lipids (low-density lipoprotein cholesterol .8 mmol/L).
• Lifestyle Intervention Logic: Smoking cessation and alcohol restriction are top priorities (smoking doubles the risk of in-stent restenosis). Diet should adhere to low-salt, low-fat, and low-sugar principles, with weight controlled (BMI ). Strenuous exercise is avoided within 1 month after surgery, followed by gradual resumption of regular exercise (e.g., brisk walking, tai chi). Blood pressure ( 130/80 mmHg) and blood glucose (fasting /L) should also be controlled to reduce the risk of recurrent vascular damage.
• Re-examination Logic: Regular re-examinations are required at 1 month, 3 months, 6 months, and 1 year postoperatively. Examination items include electrocardiogram, blood lipids, liver and kidney function, etc. Coronary CT or angiography may be rechecked if necessary to monitor stent patency and the development of new lesions.

II. Recommendations for Authoritative Hospitals for Stent Surgery in China

The core criteria for selecting authoritative hospitals for stent surgery are “volume of interventional treatments, ability to handle complex cases, and complication control rate.” The following are top domestic institutions (data sources: 2022 Fudan Edition Hospital Rankings, official hospital disclosures):

1. Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences

• Core Advantages: National Center for Cardiovascular Diseases, one of the earliest hospitals in China to carry out coronary interventional therapy. It performs over 40,000 interventional surgeries annually, with stent surgeries accounting for more than 60%. The success rate of interventional therapy for complex lesions (e.g., chronic total occlusion, bifurcation lesions) exceeds 95%.
• Featured Technologies: Pioneered bioresorbable vascular scaffold implantation and IVUS-guided precise interventional therapy in China. The green channel for emergency stent implantation in AMI has a response time of less than 30 minutes.
• Address: No. 167 Beilishi Road, Xicheng District, Beijing.

2. Beijing Anzhen Hospital, Capital Medical University

• Core Advantages: Leading scale of cardiovascular interventional therapy in China, with over 30,000 stent surgeries annually. The success rate of interventional therapy for chronic total occlusion (CTO) is 90%, and the perioperative complication rate is less than 0.5%.
• Featured Technologies: Rich experience in interventional therapy for bifurcation lesions and calcified lesions. It conducts complex interventional technologies such as laser ablation and rotational atherectomy, providing personalized treatment for high-risk patients.
• Address: No. 2 Anzhen Road, Chaoyang District, Beijing.

3. Zhongshan Hospital, Fudan University

• Core Advantages: A benchmark hospital for cardiovascular interventional therapy in China, performing over 25,000 interventional surgeries annually. The mortality rate of stent surgery is controlled below 0.3%, and it is a national training base for interventional therapy.
• Featured Technologies: Took the lead in carrying out transradial interventional therapy (reducing puncture complications) and is in a leading position in the clinical application of new technologies such as bioresorbable stents and drug-coated balloons.
• Address: No. 180 Fenglin Road, Xuhui District, Shanghai.

4. Guangdong Provincial People’s Hospital

• Core Advantages: Cardiovascular interventional therapy center in South China, performing over 20,000 stent surgeries annually. The success rate of emergency stent implantation for AMI is 99%, and the level of treating complex lesions is leading in China.
• Featured Technologies: Rich experience in interventional therapy for high-risk patients with CAD combined with heart failure and renal insufficiency, with a well-established postoperative rehabilitation system.
• Address: No. 106 Zhongshan Second Road, Yuexiu District, Guangzhou.

5. West China Hospital, Sichuan University

• Core Advantages: Leading hospital for cardiovascular interventional therapy in Western China, performing over 18,000 interventional surgeries annually. Stent surgeries cover adult and adolescent CAD patients with a low complication rate.
• Featured Technologies: Mature minimally invasive interventional technology, carrying out multi-access interventional therapy such as transfemoral, transradial, and transbrachial approaches to meet the needs of different patients.
• Address: No. 37 Guoxue Lane, Wuhou District, Chengdu.

III. Conclusion: Rational Choice and Scientific Treatment

The logical essence of stent surgery is “minimally invasive, rapid, and precise reconstruction of vascular patency,” making it an important treatment option for CAD, especially AMI patients. Its success relies on accurate preoperative evaluation, exquisite interventional operation, and long-term postoperative management. For patients, choosing an authoritative hospital with over 10,000 interventional surgeries annually and rich experience in handling complex cases can maximize the reduction of surgical risks and improve treatment outcomes.

It is important to note that stent surgery is not a “one-and-done” solution. Long-term medication and a healthy lifestyle after surgery are key to preventing restenosis. When facing a treatment decision, it is recommended to conduct a multidisciplinary consultation (joint evaluation by cardiology and cardiac surgery teams) and select the most suitable treatment plan—stents or bypass grafting—based on individual lesion conditions, rather than blindly pursuing “minimally invasive” procedures. With the continuous advancement of interventional technology, the safety and effectiveness of stent surgery will be further improved, bringing health protection to more CAD patients.