Patient: He was admitted to the nearest hospital with chest pain, shortness of breath, and back pain, and underwent stent surgery, but was discharged within a few days. The patient was admitted to the hospital for an attack of chest tightness and aggravation of chest pain. Body temperature; 36.6 degrees, pulse rate 70 beats per minute, respiration 17 beats per minute, blood pressure low pressure 80 high pressure 130, respiratory sounds clear in both lungs, no dry or wet large-format fermiumium Mu swabbing 70 times on both sides of the lungs, rhythmical, no premature beats heard, heart sounds acceptable, no pathological murmur heard in each valve area on auscultation, no abnormal radial artery pulsation bilaterally, no systolic vascular murmur heard in bilateral carotid area and supraclavicular fossa No systolic vascular murmur was heard in the epigastric region and around the umbilicus, no abnormal femoral artery pulsations bilaterally, and no abnormal dorsalis pedis artery pulsations bilaterally. The liver and spleen were not palpable under the ribs. There was no edema in both lower limbs. Auxiliary examination; electrocardiogram suggested; myocardial ischemia. Admission diagnosis; 1. Coronary atherosclerotic heart disease. Unstable angina, cardiac function grade 1 after coronary artery stent implantation, 2. Hypertensive disease grade 111. After admission, blood glucose was normal, triglycerides 2.11mmo1/L. Chest X-ray showed; aortic tortuosity, cardiothoracic ratio 0.52, left ventricular arc length, please combine with clinical. Lung, diaphragm did not show abnormalities. Ultrasound suggests; post-PCI for coronary artery disease; aortic sclerosis; reduced left ventricular diastolic relaxation with normal systolic function; color flow shows; mitral regurgitation [a small amount]. He underwent coronary angiography on April 17, 2012, and the results indicated; 30% stenosis in the proximal segment of RCA, 40-50% stenosis in the middle segment of RCA, no restenosis in the proximal middle segment of LAD stent, 40% stenosis in the middle segment, 90% stenosis in the D2 segment, 30% stenosis in the middle segment of LCX, 40% stenosis in OM2, and the rest of the vessels were normal. PCI was performed with D2 as the target lesion, and one stent was placed, and the condition improved after the surgery. I have been feeling pain in my chest occasionally for the past two days since the surgery. Yesterday, I had an ECG and blood test done at the nearest hospital. The doctor said that my heartbeat is a little slow, 51 beats per minute. I have been drinking aspirin 100mg once a day, metoprolol succinate 47.5mg once a day, atorvastatin 20mg once a night, perindopril 4mg once a night, poliovel 75mg once a day, and my blood count is 6.1mmo1/L for glucose and 2.84mmo1/L for triglyceride. There are roughly the following reasons for chest pain after stenting: 1. incomplete reconstruction of blood flow, that is, there are still narrowed vessels that have not been opened; 2. new ischemia caused by microvascular embolism during stenting; 3. small amount of pericardial effusion caused during stenting; 4. non-occlusive thrombus repeatedly formed on the stent because of insufficient anti-thrombotic strength, thus causing ischemia; 5. psychological effects. After stenting, some patients are overly nervous and focus too much on the precordial area, thus causing psychological discomfort; 6. After stenting, patients take more medications, among which aspirin and clopidogrel are more stimulating to the stomach, and less burning pain in the stomach or esophagus is often mistaken for angina. In your case, it is normal to have occasional pain because there are still many lesions that have not been released. Although it is true that you do not need to implant a stent for the lesions that are not stented, multiple mild to moderate stenoses in one vessel can also lead to ischemic attacks. The slow heart rate is due to metoprolol succinate, which can be reduced to half a tablet/day. This drug is very important in the treatment of coronary artery disease, but the heart rate should not fall below 55 beats/min after use in the resting, awake state. Continue to take other medications. Adhere to a low-fat diet and maintain a calm mind and good mood.