If a patient’s blood pressure is low due to acute myocardial infarction, tachycardia due to tachyarrhythmia, or hypertension due to excessive antihypertensive medication, the patient should register for cardiovascular medicine to adjust the blood pressure. 2. If a patient has recently become dehydrated due to diarrhea and has lowered blood pressure, he should be registered with the Department of Gastroenterology to deal with the diarrhea and pay attention to rehydration. 3, General Surgery, if a patient has bleeding due to trauma, resulting in lower blood volume and low blood pressure, he should be registered with the Department of General Surgery to stop bleeding and rehydrate to correct the low blood pressure. 4, Respiratory Medicine, if a patient has a serious infection in the lungs and is also suffering from low blood pressure, he should be registered with the Department of Respiratory Medicine for adjustment. In this case, the patient should be registered with the Department of Respiratory Medicine for anti-infection treatment and correction of hypotension at the same time.