高血压急症是指并发重要器官损伤的严重高血压,包括脑出血、蛛网膜下腔出血、高血压脑病、Ⅲ～Ⅳ级眼底改变、夹层动脉瘤、急性肺水肿、心功能不全.急性心肌梗塞或不稳定性心绞痛、子癎伴发惊厥或胎儿窘迫以及进行性肾功能不全等。严重危胁患者生命, Hypertensive emergency refers to the severe organ damage associated with severe hypertension, including cerebral hemorrhage, subarachnoid hemorrhage, hypertensive encephalopathy, grade III ~ IV fundus changes, dissecting aneurysms, acute pulmonary edema, cardiac insufficiency, acute myocardial infarction Or unstable angina pectoris, son 癎 associated with convulsions or fetal distress and progressive renal insufficiency and so on. Serious threat to patient’s life,