Ottawa Subarachnoid Hemorrhage (SAH) Rule for Headache EvaluationLoading...Age ≥ 40No0Yes+1Neck pain or stiffnessNo0Yes+1Witness loss of consciousnessNo0Yes+1Onset during exertionNo0Yes+1Thunderclap HA (instantly peaking pain)No0Yes+1Limited neck flexion on examinationNo0Yes+1Indicações de UsoInsights e Precauções