Objective to investigate the clinical features and ct characteristics of the subarachnoid haemorrhage ( sah ) .

目的探讨蛛网膜下腔出血（sah）的临床表现及ct特点。

Now generally agreed that subarachnoid hemorrhage ( sah ) due to infarction and cerebral artery spasm is the main reason for disability to death .

现在普遍认为蛛网膜下腔出血（sah）所致的脑动脉痉挛和梗死是致死致残的主要原因。