After returning to the ward after coronary angiography (especially for patients who have undergone coronary angiography via the femoral artery), the patient must be bedridden. The lower extremity of the punctured side should be absolutely braked for at least 6 hours, and the entire bed rest time should be 16 to 24 hours, depending on the different characteristics of each patient as determined by the physician. During the first 6 hours in bed, the patient should not raise his head, bend the lower extremity of the pierced side, or lie on his side. If the patient has to urinate or defecate, this should also be done in bed. This is not an inconvenience for patients who undergo coronary angiography from an upper extremity vessel. For patients who undergo coronary angiography via the upper extremity, the puncture site is usually bandaged with pressure for 4 to 6 hours. After coronary angiography, most patients will feel back pain due to prolonged bed rest and braking. At this time, some soft things like towels and cotton pads can be placed on the back of the waist, and if necessary, sedatives or analgesics can be injected. These symptoms will disappear after getting out of bed and moving around. Coronary angiography is an arterial vascular operation, and it is necessary to observe whether there is local bleeding in the wound after the procedure. If there is any bleeding from the bandaged gauze, the healthcare provider should be notified promptly. In addition, the color of the limb on the bandaged side should be noted for any abnormalities such as significant chill or pain. Of course, the health care provider will also observe these issues. After coronary angiography using the radial artery (i.e., wrist) artery of the upper extremity, roughly 5% of patients cannot feel a flexural artery pulsation after the procedure. This usually does not affect the patient and should not be a cause for concern. It is also important to observe the urine output after coronary angiography, especially in elderly patients, patients with pre-existing renal impairment, and patients with heart failure, because the contrast agent used during the angiography may have some effect on kidney function. For post-coronary angiography cardiac monitoring, different hospitals have different regulations. We usually perform ECG monitoring for 6 to 24 hours after coronary angiography.