The capillary pulsation sign is an auxiliary test to check whether the blood vessels are normal. When the patient’s nails are lightly pressed with a finger or the mucous membrane of the patient’s mouth and lips with a slide, the local area can become white, and when the heart contracts, the local area can become red again. (See severe aortic valve insufficiency or peripheral capillary wall dilatation) This examination can determine the location of the lesion and the corresponding signs. When the patient’s nail bed is pressed lightly with a finger or the mucosa of the mouth and lips is pressed lightly with a clean slide, there is no rhythmic microvascular pulsation with alternating red and white color, and the patient returns to a blood-filled state immediately after the pressure. Capillary pulsation can be examined by cardiovascular angiography: Cardiovascular angiography is the rapid injection of contrast agent into the heart cavity or blood vessels through the cardiac catheter, so that the heart and blood vessel cavities are visualized under X-ray irradiation, and at the same time, there are methods such as rapid film, television photography or tape recording to film the visualization process of the heart and blood vessel cavities. It is a valuable method to diagnose the heart and blood vessels. It is a valuable method for diagnosing cardiovascular disease. To avoid nausea and vomiting caused by the contrast agent, fast for 6 hours before the procedure, and give some sedatives such as barbiturates or valium before the procedure. Infants and children need to use intravenous or intensive anesthesia with 1% procaine local anesthesia. 2.Intraoperative operation Generally, percutaneous puncture of the femoral artery and vein is used to feed the cardiac catheter; for young children who have difficulty in puncturing, the saphenous vein or your vein can be incised to feed the catheter, or the subcutaneous artery can be incised to puncture the artery. The catheter is delivered to the site of choice for imaging. When the catheter is in the vessel and the heart cavity, heparin saline (500 ml containing 40 mg of heparin) should be used to flush the catheter to prevent clotting. After the imaging is completed, withdraw the cardiac catheter and apply pressure to the site to be punctured to stop bleeding, and then apply pressure and bandage, especially for arterial puncture, attention should be paid to stop bleeding completely to avoid the formation of hematoma. In case of incisional cannulation, the vein can be ligated with the distal vessel, while the artery should be sutured with non-invasive vascular sutures to close the vascular incision, and then the skin incision should be suspected. 3.Post-operative Cardiac angiography patients should be observed for the first 4-6 hours after returning to the ward for changes in heart rate, respiration, blood pressure and body temperature, and for timely detection of changes in cardiac function, arrhythmias, and adverse reactions to contrast agents, in order to deal with them in a timely manner. Patients who are awake should be encouraged to drink more water. Patients who are not awake should be given appropriate intravenous rehydration to promote the discharge of contrast agent to reduce the impact on the kidneys. The patient must also be observed for blood leakage from the wound. Patients with femoral vein puncture need to be bedridden for 24 hours and patients with femoral artery puncture need to be bedridden for 36 hours to avoid premature grounding resulting in puncture site hematoma or formation of entrapped aneurysm. The following diagnoses of cardiovascular disease can be made.