蛛网膜下腔出血(SAH)系指血液流入蛛网膜下腔而言。多数由于软膜上的血管破裂流入所致者,称为原发性;如果系脑实质出血后(如高血压脑出血)血液穿破脑室或软膜而引起的,称为继发性。通常将非外伤性所致者称为自发性SAH。SAH是一种常见的急性脑血管病,其发病率仅次于脑出血,脑血栓,占第三位。本病容易再发(约36%),死亡率亦高(约25%)。任何年龄均可发病,且多见于青壮年,男多于女,每年在秋季及初冬的发病较高。 Subarachnoid hemorrhage (SAH) refers to the blood flow into the subarachnoid space. Most due to rupture of inflamed blood vessels caused by infiltration, called primary; if the Department of cerebral parenchymal bleeding (such as hypertensive intracerebral hemorrhage) caused by blood or perforation of the brain, known as secondary. Non-traumatic patients are usually referred to as spontaneous SAH. SAH is a common acute cerebrovascular disease, its incidence is second only to cerebral hemorrhage, cerebral thrombosis, accounting for third place. The disease is easy to relapse (about 36%), the mortality rate is also high (about 25%). Any age can be disease, and more common in young adults, more men than women, the incidence of high in autumn and early winter each year.