Presentation of Subarachnoid Haemorrhage

It is the primary aim of this study to identify symptoms and/or specific words (trigger words) indicative of spontaneous subarachnoid haemorrhage (sSAH) during emergency telephone calls to the Emergency Medical Service Copenhagen (EMS). Further, it is the aim to determine the association between the symptoms/trigger words and sSAH, the sensitivity of the symptoms/trigger words and finally, to identify factors in the telephone visitation that may influence the level of activated prehospital response