Sarathchandran Pournamy, Farooq Saba, Dar Javeed, Khan Maria, AlRukn Suhail
Department of Neurology, Rashid Hospital, Dubai, UAE.
Consultant Rashid hospital, Saudi-German hospital& City Hospital, Dubai.
Ann Neurosci. 2021 Jul;28(3-4):122-128. doi: 10.1177/09727531211047413. Epub 2021 Oct 20.
Cerebral venous thrombosis (CVT), also known as cerebral dural venous thrombosis, is not a very common cause of stroke. It has a diverse clinical presentation, with multiple predisposing factors and imaging findings. The incidence of CVT varies in different studies. We hypothesized that the incidence of CVT in Dubai is more than that reported in the West owing to dehydration caused by the high atmospheric temperature.
We retrospectively reviewed the medical records of all patients aged more than 13 years with appropriate International Classification of Diseases, 9th Revision, codes for the diagnosis of CVT from January 1, 2010 to December 31, 2018 from three major hospitals with an acute stroke service in Dubai, United Arab Emirates.
We identified 138 patients who presented with CVT. The average frequency of CVT was 6.6 per 100,000 population. Fifty percent of the patients presented between May and September, which are considered the hottest months in the UAE. Headache was the most common presentation, followed by seizures. The most important risk factors were the use of oral contraceptive pills, anemia, and polycythemia. Our study showed a higher incidence of anemia, polycythemia, thrombophilia, and abnormal CT brain findings.
In our study, CVT was more common during the months of summer. Anemia and polycythemia were strongly associated with CVT. Public awareness about CVT, its higher incidence during summer months and strategies to avoid dehydration might be considered to reduce the incidence of CVT in summer months. However, larger studies are needed to confirm definite associations.
脑静脉血栓形成（CVT），也称为硬脑膜静脉血栓形成，并非中风的常见病因。其临床表现多样，存在多种诱发因素和影像学表现。不同研究中CVT的发病率有所不同。我们推测，由于高温导致脱水，迪拜CVT的发病率高于西方报道的发病率。
我们回顾性分析了2010年1月1日至2018年12月31日期间，阿拉伯联合酋长国迪拜三家设有急性中风服务的主要医院中，所有年龄超过13岁、具有适当的国际疾病分类第九版代码以诊断CVT的患者的病历。
我们确定了138例CVT患者。CVT的平均发病频率为每10万人6.6例。50%的患者在5月至9月就诊，这几个月被认为是阿联酋最热的月份。头痛是最常见的表现，其次是癫痫发作。最重要的危险因素是口服避孕药的使用、贫血和红细胞增多症。我们的研究显示贫血、红细胞增多症、血栓形成倾向和脑部CT异常表现的发生率较高。
在我们的研究中，CVT在夏季月份更为常见。贫血和红细胞增多症与CVT密切相关。可以考虑提高公众对CVT的认识、了解其在夏季较高的发病率以及避免脱水的策略，以降低夏季CVT的发病率。然而，需要更大规模的研究来证实确切的关联。
