Coronary Artery Disease 
Coronary artery disease (CAD), also known as coronary heart disease, is a disease in which the accumulation of coronary plaque limits blood flow to the heart muscle. The symptoms of CAD depend on the degree of the blockage. 
Coronary artery disease (CAD), also known as coronary heart disease, is a disease in which the accumulation of coronary plaque limits blood flow to the heart muscle. The symptoms of CAD depend on the degree of the blockage. 
Coronary Artery Disease 
If the artery is partially blocked, the patient may feel good when sitting down, but may experience chest pain and shortness of breath when walking or ascending the stairs. The most severe blockage is the formation of blood clots in the arteries and stopping all blood flow, leading to a heart attack.
Drug treatment: Taking antiplatelet drugs to prevent the formation of thrombosis; taking antimyocardial ischemic drugs to reduce myocardial oxygen consumption, expand coronary arteries, increase coronary blood flow, and relieve myocardial ischemia.

Bypass surgery: Improve blood supply by surgically establishing a channel between the proximal and distal ends of the narrowing of a coronary artery to make the blood bypass the stenosis to reach the distal end.

Percutaneous coronary artery stent implantation: A thin catheter is inserted into the coronary artery opening. The guide wire with the balloon stent system passes through the catheter to the stenosis site. The balloon expands and squeezes the plaque on the artery wall, while the stent  expands to support the narrowed artery. stent include bare metal stents, drug-eluting stents, as well as bioabsorbable scaffolds.
1.IBS Sirolimus-Eluting Iron Bioresorbable Coronary Scaffold System has the following features:
1) Using iron-based materials with good biocompatibility to improve the radial support strength while significantly reducing the thickness of the scaffold;
2) Asymmetric coating technology simultaneously solves corrosion and drug release
3) The surface composite coating realizes the controllable degradation of the iron-based scaffold: the new composite coating design is used to slow down the early iron corrosion  to ensure the effective support of the scaffold in the early stage and accelerate the iron corrosion rate in the later stage.
4)After placing the IBS scaffold in the coronary artery, the drug on the surface of the scaffold was gradually released to inhibit endothelial hyperplasia. At the same time, the polylactic acid coating creates a slightly acidic environment after degradation, which accelerates the corrosion of iron and solves the problem of slow corrosion and absorption rate of iron. Over time, the IBS scaffold is completely degraded, and the trace elements released by the degradation products are absorbed from the body without leaving a permanent implant.
Patients usually relieve symptoms immediately after PCI, and the coronary arteries take 3 to 6 months to recover. Once the coronary arteries heal, the support of the scaffold is no longer required. The iron-based absorbable scaffold is designed to disappear (or "absorb") from the body over time. This absorption helps restore the coronary artery to natural movement and function.

2. Compared with the mainstream permanent metal stents
A) the short-term and long-term risks associated with the permanent retention of the implant in the body are avoided, such as long-term inflammation, displacement and restenosis caused by the long-term stimulation of foreign bodies;
B) long-term dual antibody is not required to reduce the financial burden of patients and the risk of bleeding disease;
C) avoiding the risk of stimulation or even perforation of vessels caused by long-term fatigue fracture (29% of permanent stent fracture rate at autopsy);
D) to avoid long-term inflammation, displacement and restenosis caused by long-term stimulation of foreign bodies;
E) medical examination, the degradation of IBS scaffold does not affect imaging examination such as MRI and CT;
F) the degradation of IBS scaffold will no longer bind the coronary artery.

3.Compared to absorbable polymer scaffolds
A) the safety and efficacy were inferior to that of the early stage of the permanent stent, and the incidence of thrombosis in the middle stage was higher than that of the permanent stent;Limited plasticity;Acute retraction;Poor overexpansion performance; higher strut thickness.
B) few specifications: due to the limitation of the properties of the intrinsic materials of polylactic acid, on the premise of ensuring the mechanical properties, the stent  is relatively thick with few specifications, which can only cover 8% or even lower patients with simple lesions in the permanent stent group.
C) strict operational requirements: due to the limitation of the properties of polylactic acid intrinsic materials and the poor mechanical properties of scaffolds, polylactic acid scaffolds can only be applied to simple lesions, while for highly calcified blood vessels, it is necessary to remove calcified plaques in advance to put scaffolds;Adequate balloon predilation was performed on the diseased vessels before scaffold implantation, and the scaffold should be slowly expanded, otherwise the scaffold will break.
D) polylactic acid stent double resistance for a long time, not only increase the cost, but also bring bleeding complications.
E) high storage and transportation requirements
Most patients felt immediate relief after PCI surgery. This is because the condition has started to improve. Many hospitals and health care sites can provide ways to improve heart health. Patients can consult with doctors or experts about related items.

Drug treatment
After PCI surgery, the doctor will prescribe antithrombotic drugs, and the patient needs to take it according to the doctor's instructions. These drugs are designed to reduce the risk of blood clots forming on the scaffold. Be sure to follow the doctor's instructions when using these drugs.
In addition, doctors may prescribe drugs that improve heart health. The functions of these drugs include controlling blood pressure, blood sugar and cholesterol levels. Taking these drugs, as well as lifestyle changes, can effectively slow the progression of cardiovascular disease and reduce the possibility of future blood clots.

Lifestyle change
Regular exercise and eating heart-healthy foods are also ways to improve your heart health. The American Heart Association (AHA) recommends performing 40 minutes of aerobic exercise 3 to 4 times a week . For example, walking is also an important way of cardiovascular exercise. Heart-healthy foods include fruits and vegetables, lean meat, and whole grains, and avoid foods high in sugar and saturated fat . Patients can also obtain knowledge of healthy eating through other sources.
Adhering to medication and changing lifestyles can be challenging, but the rewards are huge: you can spend more time and energy with your loved ones, better work or hobbies and enjoy life. In addition, please consult your doctor before you start to carry out exercise plan, change your diet or other lifestyle.

Regular medical examination
Regular medical check-ups at the hospital will help doctors track the patient's progress and study any successful experiences or problems encountered during recovery. Doctors also hope to understand any changes in symptoms and the patient's response to medications and lifestyle changes, so as to help patients better improve heart health problems by adjusting medications or recommended programs.
1. Patient age
2. Whether the patient has other health conditions
3. Location and severity of coronary artery occlusion 
4. Patients with antiplatelet and/or anticoagulant contraindications
5. Patients who cannot receive adequate balloon dilation of angioplasty or scaffold placement at the lesion
6.Patients with iron metabolism disorder or iron overload
7. Persons who are allergic to sirolimus and its derivatives
8. Allergic to polylactic acid and its degradation products
9. Allergic to zinc, iron and their corrosion products
10. Allergic to contrast media