{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T11:38:24Z","timestamp":1761824304832,"version":"3.44.0"},"reference-count":24,"publisher":"BMJ","issue":"4","license":[{"start":{"date-parts":[[2021,3,26]],"date-time":"2021-03-26T00:00:00Z","timestamp":1616716800000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Stroke Vasc Neurol"],"accepted":{"date-parts":[[2021,1,15]]},"published-print":{"date-parts":[[2021,12]]},"abstract":"<jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>During the COVID-19 pandemic, decreased volumes of stroke admissions and mechanical thrombectomy were reported. The study\u2019s objective was to examine whether subarachnoid haemorrhage (SAH) hospitalisations and ruptured aneurysm coiling interventions demonstrated similar declines.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>We conducted a cross-sectional, retrospective, observational study across 6 continents, 37 countries and 140 comprehensive stroke centres. Patients with the diagnosis of SAH, aneurysmal SAH, ruptured aneurysm coiling interventions and COVID-19 were identified by prospective aneurysm databases or by International Classification of Diseases, 10th Revision, codes. The 3-month cumulative volume, monthly volumes for SAH hospitalisations and ruptured aneurysm coiling procedures were compared for the period before (1\u2009year and immediately before) and during the pandemic, defined as 1 March\u201331 May 2020. The prior 1-year control period (1 March\u201331 May 2019) was obtained to account for seasonal variation.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Findings<\/jats:title>\n                  <jats:p>There was a significant decline in SAH hospitalisations, with 2044 admissions in the 3\u2009months immediately before and 1585 admissions during the pandemic, representing a relative decline of 22.5% (95% CI \u221224.3% to \u221220.7%, p&lt;0.0001). Embolisation of ruptured aneurysms declined with 1170\u20131035 procedures, respectively, representing an 11.5% (95%CI \u221213.5% to \u22129.8%, p=0.002) relative drop. Subgroup analysis was noted for aneurysmal SAH hospitalisation decline from 834 to 626 hospitalisations, a 24.9% relative decline (95%\u2009CI \u221228.0% to \u221222.1%, p&lt;0.0001). A relative increase in ruptured aneurysm coiling was noted in low coiling volume hospitals of 41.1% (95% CI 32.3% to 50.6%, p=0.008) despite a decrease in SAH admissions in this tertile.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Interpretation<\/jats:title>\n                  <jats:p>There was a relative decrease in the volume of SAH hospitalisations, aneurysmal SAH hospitalisations and ruptured aneurysm embolisations during the COVID-19 pandemic. These findings in SAH are consistent with a decrease in other emergencies, such as stroke and myocardial infarction.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/svn-2020-000695","type":"journal-article","created":{"date-parts":[[2021,3,26]],"date-time":"2021-03-26T13:40:26Z","timestamp":1616766026000},"page":"542-552","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":30,"title":["Decline in subarachnoid haemorrhage volumes associated with the first wave of the COVID-19 pandemic"],"prefix":"10.1136","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2810-1685","authenticated-orcid":false,"given":"Thanh N","family":"Nguyen","sequence":"first","affiliation":[{"name":"Neurology, Radiology, Boston Medical Center, Boston, Massachusetts, USA"}]},{"given":"Diogo C","family":"Haussen","sequence":"additional","affiliation":[{"name":"Neurology, Marcus Stroke & Neuroscience Center, Grady Memorial Hospital, Emory University School of Medicine, Atlanta, GA, USA"}]},{"given":"Muhammad M","family":"Qureshi","sequence":"additional","affiliation":[{"name":"Radiology, Radiation Oncology, Boston University School of Medicine, Boston, Massachusetts, USA"}]},{"given":"Hiroshi","family":"Yamagami","sequence":"additional","affiliation":[{"name":"Neurology, National Hospital Organization Osaka National Hospital, Osaka, Japan"}]},{"given":"Toshiyuki","family":"Fujinaka","sequence":"additional","affiliation":[{"name":"Neurosurgery, National Hospital Organization Osaka National Hospital, Osaka, Japan"}]},{"given":"Ossama Y","family":"Mansour","sequence":"additional","affiliation":[{"name":"Neurology, Alexandria University, Alexandria, Egypt"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9528-301X","authenticated-orcid":false,"given":"Mohamad","family":"Abdalkader","sequence":"additional","affiliation":[{"name":"Radiology, Boston Medical Center, Boston, Massachusetts, USA"}]},{"given":"Michael","family":"Frankel","sequence":"additional","affiliation":[{"name":"Neurology, Marcus Stroke & Neuroscience Center, Grady Memorial Hospital, Emory University School of Medicine, Atlanta, GA, USA"}]},{"given":"Zhongming","family":"Qiu","sequence":"additional","affiliation":[{"name":"Department of Neurology, Xinqiao Hospital, Chongqing, China"}]},{"given":"Allan","family":"Taylor","sequence":"additional","affiliation":[{"name":"Neurosurgery, University of Cape Town, Rondebosch, Western Cape, South Africa"}]},{"given":"Pedro","family":"Lylyk","sequence":"additional","affiliation":[{"name":"Neurosurgery, Interventional Neuroradiology, Clinica La Sagrada Familia, Buenos Aires, Argentina"}]},{"given":"Omer F","family":"Eker","sequence":"additional","affiliation":[{"name":"Neuroradiologie, Neurologie Vasculaire, Hospices Civils de Lyon, Lyon, Auvergne-Rh\u00f4ne-Alpes, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9165-5763","authenticated-orcid":false,"given":"Laura","family":"Mechtouff","sequence":"additional","affiliation":[{"name":"Neurologie Vasculaire, Hospices Civils de Lyon, Lyon, Auvergne-Rh\u00f4ne-Alpes, France"}]},{"given":"Michel","family":"Piotin","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Fondation Ophtalmologique Adolphe de Rothschild, Paris, \u00cele-de-France, France"}]},{"given":"Fabricio Oliveira","family":"Lima","sequence":"additional","affiliation":[{"name":"Neurology, Hospital Geral de Fortaleza, Fortaleza, Brazil"}]},{"given":"Francisco","family":"Mont'Alverne","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Hospital Geral de Fortaleza, Fortaleza, Brazil"}]},{"given":"Wazim","family":"Izzath","sequence":"additional","affiliation":[{"name":"Neuroradiology, Nottingham University Hospitals NHS Trust, Nottingham, UK"}]},{"given":"Nobuyuki","family":"Sakai","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Hyogo, Japan"}]},{"given":"Mahmoud","family":"Mohammaden","sequence":"additional","affiliation":[{"name":"Neurology, Marcus Stroke & Neuroscience Center, Grady Memorial Hospital, Emory University School of Medicine, Atlanta, GA, USA"}]},{"given":"Alhamza R","family":"Al-Bayati","sequence":"additional","affiliation":[{"name":"Neurology, Marcus Stroke & Neuroscience Center, Grady Memorial Hospital, Emory University School of Medicine, Atlanta, GA, USA"}]},{"given":"Leonardo","family":"Renieri","sequence":"additional","affiliation":[{"name":"Interventional Neurovascular Unit, University Hospital Careggi, Firenze, Toscana, Italy"}]},{"given":"Salvatore","family":"Mangiafico","sequence":"additional","affiliation":[{"name":"Interventional Neurovascular Unit, University Hospital Careggi, Firenze, Toscana, Italy"}]},{"given":"David","family":"Ozretic","sequence":"additional","affiliation":[{"name":"Neuroradiology, University Hospital Centre Zagreb, Zagreb, Croatia"}]},{"given":"Vanessa","family":"Chalumeau","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Hopital Bicetre, Le Kremlin-Bicetre, France"}]},{"given":"Saima","family":"Ahmad","sequence":"additional","affiliation":[{"name":"Stroke and Interventional Neuroradiology, Lahore General Hospital, Lahore, Pakistan"}]},{"given":"Umair","family":"Rashid","sequence":"additional","affiliation":[{"name":"Stroke and Interventional Neuroradiology, Lahore General Hospital, Lahore, Pakistan"}]},{"given":"Syed Irteza","family":"Hussain","sequence":"additional","affiliation":[{"name":"Neurological Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, UAE"}]},{"given":"Seby","family":"John","sequence":"additional","affiliation":[{"name":"Neurological Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, UAE"}]},{"given":"Emma","family":"Griffin","sequence":"additional","affiliation":[{"name":"Department of Radiology, Beaumont Hospital, Dublin, Ireland"}]},{"given":"John","family":"Thornton","sequence":"additional","affiliation":[{"name":"Department of Radiology, Beaumont Hospital, Dublin, Ireland"}]},{"given":"Jose Antonio","family":"Fiorot","sequence":"additional","affiliation":[{"name":"Neurology, Stroke Unit, Hospital-Estadual Central, Vitoria, Brazil"}]},{"given":"Rodrigo","family":"Rivera","sequence":"additional","affiliation":[{"name":"Neuroradiology, Instituto de Neurocirugia Dr Asengo, Santiago, Chile"}]},{"given":"Nadia","family":"Hammami","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Institut National de Neurologie, Tunis, Tunisia"}]},{"given":"Anna M","family":"Cervantes-Arslanian","sequence":"additional","affiliation":[{"name":"Neurology, Boston Medical Center, Boston, Massachusetts, USA"}]},{"given":"Hormuzdiyar H","family":"Dasenbrock","sequence":"additional","affiliation":[{"name":"Neurosurgery, Boston Medical Center, Boston, MA, USA"}]},{"given":"Huynh Le","family":"Vu","sequence":"additional","affiliation":[{"name":"Stroke Center, Hue Central Hospital, Hue, Thua Thien Hue, Vietnam"}]},{"given":"Viet Quy","family":"Nguyen","sequence":"additional","affiliation":[{"name":"Stroke Center, Hue Central Hospital, Hue, Thua Thien Hue, Vietnam"}]},{"given":"Steven","family":"Hetts","sequence":"additional","affiliation":[{"name":"Radiology, University of California San Francisco, San Francisco, California, USA"},{"name":"Interventional Neuroradiology, University of California San Francisco, San Francisco, California, USA"}]},{"given":"Romain","family":"Bourcier","sequence":"additional","affiliation":[{"name":"Neuroradiologie Diagnostique et Interventionnelle, H\u00f4pital Guillaume & Ren\u00e9 Laennec, CHU Nantes, Nantes, France"}]},{"given":"Romain","family":"Guile","sequence":"additional","affiliation":[{"name":"Neuroradiologie Diagnostique et Interventionnelle, H\u00f4pital Guillaume & Ren\u00e9 Laennec, CHU Nantes, Nantes, France"}]},{"given":"Melanie","family":"Walker","sequence":"additional","affiliation":[{"name":"Neurological Surgery, University of Washington School of Medicine, Seattle, Washington, USA"}]},{"given":"Malveeka","family":"Sharma","sequence":"additional","affiliation":[{"name":"Neurology, University of Washington School of Medicine, Seattle, Washington, USA"}]},{"given":"Don","family":"Frei","sequence":"additional","affiliation":[{"name":"Radiology, Swedish Medical Center, Englewood, Colorado, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8965-2413","authenticated-orcid":false,"given":"Pascal","family":"Jabbour","sequence":"additional","affiliation":[{"name":"Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA"}]},{"given":"Nabeel","family":"Herial","sequence":"additional","affiliation":[{"name":"Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA"}]},{"given":"Fawaz","family":"Al-Mufti","sequence":"additional","affiliation":[{"name":"Neurology, Neurosurgery, Westchester Medical Center Health Network, Valhalla, New York, USA"}]},{"given":"Atilla Ozcan","family":"Ozdemir","sequence":"additional","affiliation":[{"name":"Stroke and Neurointervention Unit, Eskisehir OsmangaziUniversity, Eskisehir, Turkey"}]},{"given":"Ozlem","family":"Aykac","sequence":"additional","affiliation":[{"name":"Stroke and Neurointervention Unit, Eskisehir OsmangaziUniversity, Eskisehir, Turkey"}]},{"given":"Dheeraj","family":"Gandhi","sequence":"additional","affiliation":[{"name":"Radiology, Neurology, Neurosurgery, University of Maryland School of Medicine, Baltimore, Maryland, USA"}]},{"given":"Chandril","family":"Chugh","sequence":"additional","affiliation":[{"name":"Interventional Neurology, MAX Superspecialty Hospital, Saket, New Delhi, India"}]},{"given":"Charles","family":"Matouk","sequence":"additional","affiliation":[{"name":"Neurosurgery, Yale School of Medicine, New Haven, Connecticut, USA"}]},{"given":"Pascale","family":"Lavoie","sequence":"additional","affiliation":[{"name":"Neurosurgery, Centre Hospitalier Universitaire de Qu\u00e9bec-Universit\u00e9 Laval, Quebec, Quebec, Canada"}]},{"given":"Randall","family":"Edgell","sequence":"additional","affiliation":[{"name":"Neurology, St Louis University School of Medicine, St Louis, Missouri, USA"}]},{"given":"Andre","family":"Beer-Furlan","sequence":"additional","affiliation":[{"name":"Neurological Surgery, Rush University Medical Center, Chicago, IL, USA"}]},{"given":"Michael","family":"Chen","sequence":"additional","affiliation":[{"name":"Neurological Surgery, Rush University Medical Center, 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Japan"}]},{"given":"Daisuke","family":"Watanabe","sequence":"additional","affiliation":[{"name":"Stroke and Neurovascular Surgery, IMS Tokyo-Katsushika General Hospital, Tokyo, Japan"}]},{"given":"Dong Hun","family":"Shin","sequence":"additional","affiliation":[{"name":"Gachon University, Seongnam, Korea (the Republic of)"}]},{"given":"Pedro SC","family":"Magalhaes","sequence":"additional","affiliation":[{"name":"Stroke Unit, Hospital Municipal Sao Jose, Joinville, Santa Catarina, Brazil"}]},{"given":"Raghid","family":"Kikano","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Lau Medical Center, Beirut, Lebanon"}]},{"given":"Santiago","family":"Ortega-Gutierrez","sequence":"additional","affiliation":[{"name":"Neurology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA"}]},{"given":"Mudassir","family":"Farooqui","sequence":"additional","affiliation":[{"name":"Neurology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA"}]},{"given":"Amal","family":"Abou-Hamden","sequence":"additional","affiliation":[{"name":"Neurosurgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia"}]},{"given":"Tatsuo","family":"Amano","sequence":"additional","affiliation":[{"name":"Stroke and Cerebrovascular Medicine, Kyorin University, Mitaka, Tokyo, Japan"}]},{"given":"Ryoo","family":"Yamamoto","sequence":"additional","affiliation":[{"name":"Neurology, Yokohama Brain and Spine Center, Yokohama, Japan"}]},{"given":"Adrienne","family":"Weeks","sequence":"additional","affiliation":[{"name":"Neurosurgery, Dalhousie University, Halifax, Nova Scotia, Canada"}]},{"given":"Elena A","family":"Cora","sequence":"additional","affiliation":[{"name":"Radiology, QEII Health Sciences Centre, Dalhousie University, Dalhousie, Nova Scotia, Canada"}]},{"given":"Rotem","family":"Sivan-Hoffmann","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Rambam Health Care Campus, Haifa, Haifa, Israel"}]},{"given":"Roberto","family":"Crosa","sequence":"additional","affiliation":[{"name":"Centro Endovascular Neurologico Medica Uruguaya, Montevideo, Uruguay"}]},{"given":"Markus","family":"M\u00f6hlenbruch","sequence":"additional","affiliation":[{"name":"Neuroradiology, Heidelberg University Hospital, Heidelberg, Baden-W\u00fcrttemberg, Germany"}]},{"given":"Simon","family":"Nagel","sequence":"additional","affiliation":[{"name":"Neurology, Heidelberg University Hospital, Heidelberg, Baden-W\u00fcrttemberg, Germany"}]},{"given":"Hosam","family":"Al-Jehani","sequence":"additional","affiliation":[{"name":"Neurosurgery, Interventional Radiology and Critical Care Medicine, King Fahad Hospital of the University, Imam Abdulrahman bin Faisal University, Alkhobar, Saudi Arabia"}]},{"given":"Sunil A","family":"Sheth","sequence":"additional","affiliation":[{"name":"Neurology, University of Texas McGovern Medical School, Houston, Texas, USA"}]},{"given":"Victor S","family":"Lopez Rivera","sequence":"additional","affiliation":[{"name":"Neurology, University of Texas McGovern Medical School, Houston, Texas, USA"}]},{"given":"James E","family":"Siegler","sequence":"additional","affiliation":[{"name":"Neurology, Cooper University Hospital, Cooper Medical School of Rowan University, Camden, New Jersey, USA"}]},{"given":"Achmad Fidaus","family":"Sani","sequence":"additional","affiliation":[{"name":"Airlangga University, Surabaya, Jawa Timur, Indonesia"}]},{"given":"Ajit S","family":"Puri","sequence":"additional","affiliation":[{"name":"Neurointerventional Radiology, University of Massachusetts Medical School, Worcester, Massachusetts, USA"}]},{"given":"Anna Luisa","family":"Kuhn","sequence":"additional","affiliation":[{"name":"Neurointerventional Radiology, University of Massachusetts Medical School, Worcester, Massachusetts, USA"}]},{"given":"Gianmarco","family":"Bernava","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, University Hospitals Geneva, Geneva, Switzerland"}]},{"given":"Paolo","family":"Machi","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, University Hospitals Geneva, Geneva, Switzerland"}]},{"given":"Daniel G","family":"Abud","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Ribeir\u00e3o Preto Medical School, University of S\u00e3o Paulo, S\u00e3o Paulo, Brazil"}]},{"given":"Octavio M","family":"Pontes-Neto","sequence":"additional","affiliation":[{"name":"Neuroscience and Behavioral Sciences, Ribeir\u00e3o Preto Medical School, University of S\u00e3o Paulo, S\u00e3o Paulo, Brazil"}]},{"given":"Ajay K","family":"Wakhloo","sequence":"additional","affiliation":[{"name":"Interventional Neuroradiology, Beth Israel Lahey Health, Burlington, Massachusetts, USA"}]},{"given":"Barbara","family":"Voetsch","sequence":"additional","affiliation":[{"name":"Neurology, Beth Israel Lahey Health, Burlington, Massachusetts, USA"}]},{"given":"Eytan","family":"Raz","sequence":"additional","affiliation":[{"name":"Radiology, NYU Langone Health, NYU Grossman School of Medicine, New York, New York, USA"}]},{"given":"Shadi","family":"Yaghi","sequence":"additional","affiliation":[{"name":"Neurology, NYU Langone Health, NYU Grossman School of Medicine, New York, New York, USA"}]},{"given":"Brijesh P","family":"Mehta","sequence":"additional","affiliation":[{"name":"Memorial Neuroscience Institute, Pembroke Pines, Florida, USA"}]},{"given":"Naoto","family":"Kimura","sequence":"additional","affiliation":[{"name":"Neurosurgery, Iwate Prefectural Central Hospital, Morioka, Iwate, Japan"}]},{"given":"Mamoru","family":"Murakami","sequence":"additional","affiliation":[{"name":"Neurosurgery, Kyoto Second Red Cross Hospital, Kyoto, Japan"}]},{"given":"Jin Soo","family":"Lee","sequence":"additional","affiliation":[{"name":"Ajou University Hospital, Suwon, Gyeonggi-do, South Korea"}]},{"given":"Ji Man","family":"Hong","sequence":"additional","affiliation":[{"name":"Ajou University Hospital, Suwon, Gyeonggi-do, South Korea"}]},{"given":"Robert","family":"Fahed","sequence":"additional","affiliation":[{"name":"Neurology, University of Ottawa, Ottawa, Ontario, Canada"}]},{"given":"Gregory","family":"Walker","sequence":"additional","affiliation":[{"name":"Neurology, University of Ottawa, Ottawa, Ontario, Canada"}]},{"given":"Eiji","family":"Hagashi","sequence":"additional","affiliation":[{"name":"Cerebrovascular Medicine, Saga-ken Medical Centre Koseikan, Saga, Japan"}]},{"given":"Steve M","family":"Cordina","sequence":"additional","affiliation":[{"name":"Neurology, Neurosurgery, Radiology, University of South Alabama, Mobile, Alabama, USA"}]},{"given":"Hong Gee","family":"Roh","sequence":"additional","affiliation":[{"name":"Konkuk University, Gwangjin-gu, Seoul, South Korea"}]},{"given":"Ken","family":"Wong","sequence":"additional","affiliation":[{"name":"Interventional 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J","family":"Mack","sequence":"additional","affiliation":[{"name":"Neurosurgery, University of Southern California, Los Angeles, California, USA"}]},{"given":"Matthew","family":"Tenser","sequence":"additional","affiliation":[{"name":"Neurosurgery, University of Southern California, Los Angeles, California, USA"}]},{"given":"Tatemi","family":"Todaka","sequence":"additional","affiliation":[{"name":"Neurosurgery, Japanese Red Cross Kumamoto Hospital, Kumamoto, Kumamoto, Japan"}]},{"given":"Miki","family":"Fujimura","sequence":"additional","affiliation":[{"name":"Neurosurgery, Kohnan Hospital, Sendai, Miyagi, Japan"}]},{"given":"Roberta","family":"Novakovic","sequence":"additional","affiliation":[{"name":"Radiology, Neurology, UT Southwestern, Dallas, Texas, USA"}]},{"given":"Jun","family":"Deguchi","sequence":"additional","affiliation":[{"name":"Endovascular Neurosurgery, Nara City Hospital, Nara, Nara, 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