What is the purpose of the AHA Scientific Statements? 
The purpose of the AHA Scientific Statements is to provide evidenced-based medicine on various clinical topics and to keep the statements as current as possible. The AHA commissions guidelines on various clinical topics and endeavors to keep them as current as possible. The prior aneurysmal subarachnoid hemorrhage (aSAH) guidelines, sponsored by the AHA Stroke Council, were previously issued in 1994 and 2009.