Post-coronary stent surgery precautions: Comprehensive answers to eight common questions

Frequently Asked Questions about Coronary Stents (Pre-operative):

Question 1: Domestic vs. Imported Stents
Current clinical observations suggest no significant difference between domestic and imported stents. Imported stents offer some advantages in small vessels (<2.5mm diameter). With mass production, the price difference between domestic and imported stents is negligible. The choice should be based on the patient's specific condition.

Question 2: Fear of Open-Chest Treatment and Reluctance to Undergo Bypass Surgery
Many patients with multivessel coronary artery disease or coronary artery stenosis scores suitable for bypass surgery often refuse due to concerns about the risks of open-chest surgery, opting instead for stent implantation. Dr. Zhou reminds everyone: Patients meeting the indications for bypass surgery should choose bypass treatment. Stent implantation at this stage is more complex and carries higher risks than bypass surgery. Furthermore, the risk of restenosis after stent implantation is higher, potentially leading to financial and health problems and the need for bypass surgery again. Therefore, do not blindly believe that stents are "minimally invasive" and abandon the best treatment option.

Frequently Asked Questions about Coronary Stents (Post-Op):

1. What are the possible symptoms after stent placement?
Post-coronary stent placement may cause discomfort or pain in the precordial region for two reasons: First, the stent, as a foreign object, supports the coronary artery, similar to the discomfort experienced when getting dentures for the first time. Combined with patient anxiety, this can easily lead to precordial pain and discomfort, but it is completely different from pre-operative angina. In this case, the electrocardiogram (ECG) results are normal, and the discomfort usually disappears within a short period. Second, post-operative complications may include acute vascular occlusion, sudden thrombus formation in the coronary artery, or acute myocardial infarction. In such cases, emergency coronary angiography is required for diagnosis and emergency re-interventional treatment.

2. Will the coronary stent collapse, shift, or rust in the body?
Coronary stents are mostly made of stainless steel alloy, which has strong support, corrosion resistance, and shape memory function, and will not collapse or rust. The high pressure applied during stent expansion during the procedure, exceeding 6-8 times the pressure of a car tire, ensures the stent is firmly embedded in the coronary artery wall, thus preventing displacement.

3. When can patients get out of bed after stent implantation?

The time it takes for patients to get out of bed after surgery depends on their condition: Generally, patients with coronary artery disease can get out of bed a few hours after surgery and can be discharged 2-3 days later; patients with acute myocardial infarction require a longer recovery period due to partial myocardial necrosis and can generally get out of bed 3-4 days after surgery; patients with serious complications such as heart failure need 5-10 days before they can get out of bed.

4. When can patients return to work after stent implantation? After coronary artery stenosis is effectively resolved, patients' quality of life is significantly improved. Generally, patients can return to work 7 days after surgery, but patients with acute myocardial infarction need 3-8 weeks of rest before returning to work.

5. How should patients properly "rest" after stent implantation? Rest does not mean bed rest. Proper rest includes a reasonable diet, control of risk factors for vascular stenosis, regular and correct exercise, and taking medications on time.

6. What dietary precautions should patients take after stent implantation? Many patients worry about re-stenosis of the blood vessels after stent implantation, so they eat vegetarian food and very little oil. In fact, this method not only fails to prevent blood vessel narrowing but is actually harmful. This is because 30% of the body's lipids come from diet, and 70% are produced by the liver. This means that even if you don't eat, lipids are still being produced daily. Without meat or unsaturated fatty acids, the body will lack nutrition and may even develop cancer. Therefore, patients who have received stents do not need to deliberately control their diet. However, they should consume a moderate amount of various vegetables, fruits, and meats, increase their exercise, and promote lipid metabolism. This is the correct approach.

7. Can I have an MRI after stent placement? Under a 3.0T magnetic field, the temperature rise of the cardiac stent due to heat conduction does not exceed 2.6℃~4.7℃. With the continuous flushing of blood within the blood vessels, this temperature rise is almost negligible, and the stent will not shift. Therefore, patients can undergo MRI scans with a field strength below 3.0T 6 weeks after stent placement.

8. After stent placement, many medications are taken. Can liver-protecting drugs be taken simultaneously? Patients with coronary heart disease, especially after coronary stent implantation, need to take multiple medications long-term, including statins and antiplatelet drugs. Due to concerns about liver damage, some patients self-medicate with liver-protecting drugs, which is incorrect. Normally, the incidence of adverse reactions to medications is low, and doctors will have patients regularly check their liver and kidney function while taking medication. If several tests show no problems, it means that adverse reactions to these medications have not occurred, and patients can use the medications with peace of mind. Liver-protecting drugs are also medications and need to be metabolized by the liver and kidneys, which can also put a burden on them. Therefore, patients do not need to self-medicate with liver-protecting drugs.