Clinical outcomes, including performance on cognitive assessment, in patients with angiographically negative subarachnoid haemorrhage (anSAH) are often interpreted as benign with a good prognostic trajectory. However, diffuse cognitive deficits have been reported within this patient cohort resulting from anSAH, albeit to a lesser extent when compared to other neurovascular events. We consider cognitive outcomes in relation to anSAH to systematically review reported deficits, with a view to quantify and categorise cognitive impairment in this cohort. Anxiety and depression were also included within this review, provided they were assessed alongside cognitive function. Performance deficits in attention and executive function are commonly reported, with set-shifting and interference tasks most commonly impaired in patients. Non-executive cognitive functions are negatively implicated also. Clinical implications and hypotheses relating to the source of these deficits are discussed. This review was formally registered with PROSPERO (CRD42017075294).

中文翻译：

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血管造影阴性蛛网膜下腔出血的认知结果的系统评价。

血管造影阴性蛛网膜下腔出血（anSAH）患者的临床结局，包括认知评估表现，通常被认为是良性的，具有良好的预后轨迹。然而，据报道该患者队列中因SAH引起的弥散性认知缺陷，尽管与其他神经血管事件相比程度较轻。我们认为与anSAH相关的认知结果可以系统地审查所报告的缺陷，以量化和分类此队列中的认知障碍。焦虑和抑郁也包括在本评价中，只要对它们进行认知功能评估即可。注意力和执行功能方面的功能缺陷是经常报告的，患者最常受损的是调班和干扰任务。非执行性认知功能也受到负面影响。讨论了与这些缺陷来源有关的临床意义和假设。该评论已在PROSPERO（CRD42017075294）正式注册。