高血压危象是发生在高血压病过程中的一种以周围小动脉发生暂时性强烈痉挛，使血压急剧升高的特殊临床现象。在各种原因引起的高血压病中均可见到。这类患者往往症状严重，病情危急。在抢救过程中应尽早降低血压，以降低病死率。几年来，我们应用酚妥拉明静脉注射，获得迅速降? Hypertensive crisis is a special clinical phenomenon occurred in the process of hypertension in a temporary spasm of peripheral arterioles, blood pressure increased dramatically. Can be seen in a variety of causes of hypertension. Such patients often have severe symptoms and are in critical condition. In the rescue process should lower blood pressure as soon as possible to reduce mortality. In recent years, we applied intravenous injection of phentolamine, rapid drop?