{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T15:11:36Z","timestamp":1784214696612,"version":"3.55.0"},"reference-count":16,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T00:00:00Z","timestamp":1773619200000},"content-version":"vor","delay-in-days":74,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Neurological Medicine"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>\n                    Reversible cerebral vasoconstriction syndrome (RCVS) is a condition characterized by severe, sudden headaches, and transient cerebral artery constriction, often triggered by medications, physical activities, or comorbidities. Recent studies have linked RCVS to SARS\u2010CoV\u20102 infection. This case report presents a novel instance of RCVS with nonaneurysmal subarachnoid hemorrhage (SAH) following COVID\u201019. A 44\u2010year\u2010old female with COVID\u201019 presented with a sudden, severe headache, confusion, dizziness, and photophobia. Imaging revealed extensive SAH and hydrocephalus. Despite the absence of classic RCVS triggers, a cerebral angiogram showed multifocal vasospasms in both anterior and posterior circulations which later resolved on repeat cerebral angiography. The patient\u2019s condition improved with external ventricular drainage followed by symptomatic treatment. She was diagnosed with RCVS after achieving an RCVS\n                    <jats:sub>2<\/jats:sub>\n                    score of seven points. She had a final modified Rankin scale of zero at 40\u2010month follow\u2010up. This case highlights the potential association between COVID\u201019 and RCVS, even in the absence of common triggers. While causality cannot be definitively established, the temporal relationship and plausible biological mechanisms warrant further investigation. This report underscores the importance of considering RCVS in patients with neurological symptoms following COVID\u201019 and contributes to the understanding of the virus\u2019s impact on the vasculature.\n                  <\/jats:p>","DOI":"10.1155\/crnm\/4136897","type":"journal-article","created":{"date-parts":[[2026,3,17]],"date-time":"2026-03-17T05:21:13Z","timestamp":1773724873000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["COVID\u201019\u2013Associated Reversible Cerebral Vasoconstriction Syndrome: A Rare Case of Secondary Thunderclap 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Headache Attributed to Reversible Cerebral Vasoconstriction Syndrome (RCVS) 2025."},{"key":"e_1_2_10_15_2","doi-asserted-by":"publisher","DOI":"10.1212\/wnl.0000000000006917"},{"key":"e_1_2_10_16_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamaneurol.2013.3484"}],"container-title":["Case Reports in Neurological 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