Stroke is a neurological emergency that tends to be the first cause of death in many countries. Atmospheric variables are strongly associated with stroke, in which subarachnoid hemorrhage (SAH) has been associated in many studies to meteorological risk factors such as air pollution, air pressure, weather changes, and ambient temperature. These characteristics may influence the brain circulation and cause SAH, being diagnosed as idiopathic SAH or SAH with unknown cause. The main objective of this review is to present the most relevant meteorological risk factors that may develop subarachnoid hemorrhage according to the current evidence that supports the strong association. Brain vessel circulation may be influenced by atmospheric variables such as air pollution and weather changes, generating intrinsic changes in the intima of the vessels which leads to vasospasm and with comorbidities associated may develop SAH.

中文翻译：

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大气变量和蛛网膜下腔出血：叙述性评论

中风是一种神经系统急症，在许多国家往往是第一个死亡原因。大气变量与中风密切相关，其中蛛网膜下腔出血 (SAH) 在许多研究中与气象风险因素有关，如空气污染、气压、天气变化和环境温度。这些特征可能会影响脑循环并引起SAH，被诊断为特发性SAH或原因不明的SAH。本综述的主要目的是根据目前支持强关联的证据，介绍可能发生蛛网膜下腔出血的最相关气象风险因素。脑血管循环可能会受到大气变量的影响，例如空气污染和天气变化，