The frequency of triggers (eg, vasoconstrictive drugs) and risk factors (eg, migraine) were not significantly different between hemorrhagic and nonhemorrhagic RCVS or between subgroups (ICH versus non-ICH, isolated cSAH versus normal scan). It is usually reported in the context of a trigger such as medications, recreational drugs, or the postpartum state; however, it … We aimed to identify features that differentiate RCVS-SAH from more ominous causes of SAH, i.e. Reversible cerebral vasoconstriction syndrome (RCVS) is characterized by recurrent thunderclap headaches associated with segmental vasoconstriction of cerebral arteries, which may result in intracranial hemorrhage (ICH). Risk factors for the development of intracranial hemorrhage in patients with RCVS include a history of migraines, older age, and female sex. Most parenchymal brain lesions occur simultaneously and sequentially with cerebral vasoconstriction in RCVS patients. There is a lack of contemporary data available regarding the ICH burden in RCVS cohort. Ischemic stroke and intracerebral hemorrhage are well-documented sequelae, but subarachnoid hemorrhage is an uncommon complication of RCVS. 11,61 Subarachnoid hemorrhage, the most common hemorrhagic complication of RCVS, is most often focal and localized in superficial cerebral sulci near the cerebral convexities. Reversible cerebral vasoconstriction syndrome (RCVS) is a rare vasculopathy of unknown etiology. RCVS has classically been described as occurring without subarachnoid hemorrhage (SAH) in the setting of normal or near normal CSF analy-sis.1e4 9101718Although there have been reports of non-aneurysmal SAH associated with RCVS,20e24 there have been few series demonstrating SAH as an important feature of RCVS.525e27 We report Thunderclap headaches, stroke, seizures, and cortical subarachnoid hemorrhage can all reveal reversible cerebral vasoconstriction syndrome (RCVS). Two cases occurred in postpartum women, two in women with a history of … Hemorrhages occurred in 43% including 21 patients with intracerebral hemorrhage (ICH) and 62 with convexal subarachnoid hemorrhage (cSAH). We report six cases of RCVS associated with subarachnoid hemorrhage. Over 30% RCVS patients develop subarachnoid hemorrhage (SAH). RCVS has classically been described as occurring without subarachnoid hemorrhage (SAH) in the setting of normal or near normal CSF analysis.1–4 9 10 17 18 Although there have been reports of non-aneurysmal SAH associated with RCVS,20–24 there have been few series demonstrating SAH as an important feature of RCVS.5 25–27 We report a case series of 11 RCVS patients, the majority … Background: Reversible cerebral vasoconstriction syndrome (RCVS) is a self-limited entity with usually benign outcome. aneurysmal SAH (aSAH) and cryptogenic ‘angio-negative’ SAH (cSAH). Reversible cerebral vasoconstriction syndrome (RCVS) is a well-described clinical syndrome leading to vasoconstriction in the intracra- nial vessels, and has been associated with convexity subarachnoid hemorrhage and oc- casionally cervical artery dissection.