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• W3033876227 abstract "HomeStrokeVol. 51, No. 7Ischemic Stroke Epidemiology During the COVID-19 Pandemic Free AccessEditorialPDF/EPUBAboutView PDFView EPUBSections ToolsAdd to favoritesDownload citationsTrack citationsPermissions ShareShare onFacebookTwitterLinked InMendeleyReddit Jump toFree AccessEditorialPDF/EPUBIschemic Stroke Epidemiology During the COVID-19 PandemicNavigating Uncharted Waters With Changing Tides Georgios Tsivgoulis, Aristeidis H. Katsanos, Raffaele Ornello and Simona Sacco Georgios TsivgoulisGeorgios Tsivgoulis Correspondence to: Georgios Tsivgoulis, MD, Second Department of Neurology, Attikon University Hospital, School of Medicine, National and Kapodistrian University of Athens School of Medicine, Iras 39, Gerakas Attikis, Athens 15344, Greece. Email E-mail Address: [email protected] Second Department of Neurology, Attikon University Hospital, National and Kapodistrian University of Athens, School of Medicine, Greece (G.T.). Department of Neurology, The University of Tennessee Health Science Center, Memphis (G.T.). Search for more papers by this author , Aristeidis H. KatsanosAristeidis H. Katsanos Division of Neurology, McMaster University/Population Health Research Institute, Hamilton, ON, Canada (A.H.K.). Search for more papers by this author , Raffaele OrnelloRaffaele Ornello Neuroscience Section, Department of Applied Clinical Sciences and Biotechnology, University of L’Aquila, Italy (R.O., S.S.). Search for more papers by this author and Simona SaccoSimona Sacco Neuroscience Section, Department of Applied Clinical Sciences and Biotechnology, University of L’Aquila, Italy (R.O., S.S.). Search for more papers by this author Originally published4 Jun 2020https://doi.org/10.1161/STROKEAHA.120.030791Stroke. 2020;51:1924–1926This article is a commentary on the followingSARS-CoV-2 and Stroke in a New York Healthcare SystemClinical Characteristics and Outcomes of COVID-19 Patients With a History of Stroke in Wuhan, ChinaOther version(s) of this articleYou are viewing the most recent version of this article. Previous versions: June 4, 2020: Ahead of Print See related articles, p 2003 and p 2220In December 2019, a novel coronavirus causing pneumonia and severe acute respiratory syndrome emerged in Wuhan, China.1 The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has quickly spread worldwide, and pandemic outbreak of coronavirus disease 2019 (COVID-19) was declared by the World Health Organization on March 11, 2020.1 During this pandemic, stroke care delivery is relentlessly facing critical challenges, while physicians continue to struggle in uncharted territory.2 Emerging cohort studies suggest for a potential increased risk for cerebrovascular diseases in patients with COVID-19, while also raise concerns for increased morbidity and mortality for patients experiencing both COVID-19 infection and stroke.3–6The current issue of Stroke journal features 2 retrospective cohort studies investigating characteristics and outcomes of COVID-19 patients suffering a stroke.7,8 In the first study, Qin et al7 report that in a total of 1875 patients with COVID-19 hospitalized at a single-center institution from January 27, 2020, to March 5, 2020, in Wuhan, China, 50 patients had a history of stroke (90% of which were ischemic, and 10% were hemorrhagic). In the second study, Yaghi et al8 report that in a total 3556 patients with diagnosis of COVID-19 hospitalized between March 15, 2020, and April 19, 2020, within a major health system in New York, 32 (0.9%) experienced an ischemic stroke. Out of the 32 patients in the study by Yaghi et al,8 the index ischemic stroke was the reason for admission in 14 cases (43.8%), while the remaining 18 patients (56.2%) developed ischemic stroke during their hospitalization for COVID-19 respiratory symptoms.The two studies7,8 give us different and important messages to gain more insights into the complex relationship between COVID-19 and stroke. The study by Qin et al7 indicates that subjects with a history of stroke are at higher risk of poor outcome if they develop COVID-19, due to increased risk for acute respiratory distress syndrome, need of mechanical ventilation support, and intensive care admission. In-hospital mortality was higher for patients with COVID-19 and history of stroke compared with COVID-19 patients without history of stroke.7The study by Yaghi et al8 provides rates of ischemic stroke occurrence in patients with COVID-19 and gives some insights into the characteristics of the ischemic events. The reported prevalence rate of concurrent COVID-19 infection and ischemic stroke is significantly lower in the study by Yaghi et al8 compared with those reported by previous cohort studies published to date (Figure).Download figureDownload PowerPointFigure. Rates of ischemic stroke reported in available to date cohort studies of patients infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Case reports and case series were not included. Pooled rate was estimated under the random effects model. AIS indicates acute ischemic stroke; and COVID-19, coronavirus disease 19.Differences in the patient populations, consisting of a multiethnic representative sample in the study by Yaghi et al,8 differences in healthcare system organization, and intensity of screening should also be taken into consideration. In the study by Yaghi et al,8 screening for COVID-19 was performed at first provider contact only for patients with a history of fever or respiratory symptoms. It has been very well documented that a significant proportion of COVID-19 patients may have very mild symptoms or be even asymptomatic9 and that the sensitivity of COVID-19 screening testing can also vary.10 Therefore, it becomes evident that the reported ischemic stroke rates in COVID-19 patients should always be interpreted within the setting of the implemented diagnostic protocol for COVID-19 cases.In the cohort by Yaghi et al,8 diagnostic workup did not establish the ischemic stroke etiology for a substantial proportion of patients with concurrent COVID-19 infection and ischemic stroke. Cryptogenic stroke diagnosis was twice more prevalent in COVID-19–positive patients (65.6%), compared with both COVID-19–negative contemporary stroke patients (30.4%) and ischemic stroke patients hospitalized in the same hospital system between March 15, 2019, and April 15, 2019 (25.0%).8 Compared with the historical COVID-19–negative stroke cases mentioned above, COVID-19–positive stroke patients were younger and present with more severe stroke syndromes, which was attributed to higher proximal large vessel occlusion prevalence.8 These findings are in concordance with a recent case-series publication from another New York stroke center raising concerns for a potential increased risk for severe stroke syndromes in young patients affected by COVID-19.11The laboratory investigations of COVID-19 patients with stroke history in the cohort by Qin et al7 revealed higher neutrophil count and lower lymphocyte and platelet counts than those without a history of stroke. Interestingly, interleukin-6, D-dimers, troponin, and N-terminal pro-brain natriuretic peptide levels were markedly elevated in patients with COVID-19 infection suffering a stroke compared with contemporary COVID-19 patients without stroke symptoms.7 Likewise, patients with COVID-19 and ischemic stroke in the study by Yaghi et al8 had higher D-dimer levels, when compared with contemporary COVID-19 patients without stroke symptoms, but also elevated troponin and erythrocyte sedimentation rate levels, when compared with historical ischemic stroke control patients not infected by COVID-19. A presumptive underlying hypercoagulability disorder,12,13 coupled with the lack of established stroke etiology, prompted the initiation of anticoagulation in 25 (78.1%) COVID-19 patients suffering from ischemic stroke in the study by Yaghi et al.8 SARS-CoV-2 infection has been linked to a prothrombotic state, causing venous and arterial thromboembolism and elevated D-dimer levels.14 As data suggest that SARS-CoV-2 infection can act as a trigger for the development of a prothrombotic state leading to thromboembolic complications, the International Society of Thrombosis and Haemostasis currently recommends for immediate low-dose (prophylactic) anticoagulation with low-molecular-weight heparin for hospitalized COVID-19 patients.15 However, existing data on the utility of empirical therapeutic anticoagulation, using intermediate or full doses, in COVID-19 patients without evidence of venous thromboembolism are very limited to date.16Finally, in the study by Yaghi et al,8 63.6% of the stroke patients with active SARS-CoV-2 infection died during their hospitalization. However, as the vast majority of these patients (81.3%) met the criteria for severe COVID-19 disease, it is particularly challenging to estimate the additional contribution of stroke in the fatal outcome.8 The findings of both studies by Qin et al7 and Yaghi et al8 are in accordance with a very recent meta-analysis suggesting that stroke is associated with a 2.5-fold increase in the likelihood of severe COVID-19, with a trend for increased mortality.17As stroke physicians are struggling to sustain optimal patient care in both the acute and in-hospital setting during COVID-19 pandemic, the need for high-quality data to inform healthcare planning and treatment decisions becomes more compelling than ever. The COVID-19 outbreak is reported to be associated with a decrease in hospital admissions18 and acute treatments.19 On the contrary, COVID-19 itself might contribute to the development of vascular events. The prevalence of ischemic stroke in COVID-19 patients is estimated at 1.6% (95% CI, 0.8%–2.5%) in a meta-analysis of available cohort studies (Figure), but there is substantial heterogeneity (I2=47%) across the included studies due to methodological differences in case ascertainment. Even though accruing preliminary evidence suggests an increased stroke risk in COVID-19 patients, the true effect of this association still remains uncertain. Given the disparities in prevalence rates reported to date, the establishment of univocal screening protocols seems to be imperative.The COVID-19 outbreak had a relevant impact not only on the epidemiology but also on the determined etiology of stroke, as shown by the high proportion of cryptogenic strokes.8 The hypothesis of inflammation-induced hypercoagulability and occult cardioembolism in COVID-19 stroke patients deserves further investigation. As we wait for evidence-based guidance on the optimal management for COVID-19 patients suffering an ischemic stroke of undetermined etiology, the decision for anticoagulation should be individualized and after carefully weighting the ischemic and bleeding risks for each patient. COVID-19 is a systemic disease requiring the collaboration between different medical disciplines. When navigating in the uncharted waters of a novel virus outbreak, all mariners have to collaborate in the best possible way.Sources of FundingNone.DisclosuresDr Ornello reports nonfinancial support from Novartis, Teva, and Allergan outside the submitted work. Dr Sacco reports personal fees and nonfinancial support from Allergan, Abbott, Eli Lilly, Novartis, and Teva; personal fees from Medscape; and other from Bayer, Pfizer, Medtronic, Starmed, Bristol-Myers Squibb, and Daiichi Sankyo outside the submitted work.FootnotesFor Sources of Funding and Disclosures, see page 1926.The opinions expressed in this article are not necessarily those of the editors or of the American Heart Association.Correspondence to: Georgios Tsivgoulis, MD, Second Department of Neurology, Attikon University Hospital, School of Medicine, National and Kapodistrian University of Athens School of Medicine, Iras 39, Gerakas Attikis, Athens 15344, Greece. Email tsivgoulisgiorg@yahoo.grReferences1. Zhu N, Zhang D, Wang W, Li X, Yang B, Song J, Zhao X, Huang B, Shi W, Lu R, et al; China Novel Coronavirus Investigating and Research Team. A novel coronavirus from patients with pneumonia in China, 2019.N Engl J Med. 2020; 382:727–733. doi: 10.1056/NEJMoa2001017CrossrefMedlineGoogle Scholar2. Markus HS, Brainin M. COVID-19 and stroke-a global world stroke organization perspective.Int J Stroke. 2020; 15:361–364. doi: 10.1177/1747493020923472Google Scholar3. Helms J, Tacquard C, Severac F, Leonard-Lorant I, Ohana M, Delabranche X, Merdji H, Clere-Jehl R, Schenck M, Gandet FF, et al. High risk of thrombosis in patients with severe SARS-CoV-2 infection: a multicenter prospective cohort study.Intensive Care Med. 2020;1–10. doi: 10.1007/s00134-020-06062-xGoogle Scholar4. Klok FA, Kruip MJHA, van der Meer NJM, Arbous MS, Gommers D, Kant KM, Kaptein FHJ, van Paassen J, Stals MAM, Huisman MV, Endeman H. 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Oxley TJ, Mocco J, Majidi S, Kellner CP, Shoirah H, Singh IP, De Leacy RA, Shigematsu T, Ladner TR, Yaeger KA, et al. Large-vessel stroke as a presenting feature of COVID-19 in the young.N Engl J Med. 2020; 382:e60. doi: 10.1056/NEJMc2009787CrossrefMedlineGoogle Scholar12. Valderrama EV, Humbert K, Lord A, Frontera J, Yaghi S. Severe acute respiratory syndrome coronavirus 2 infection and ischemic stroke [published online May 12, 2020].Stroke. 2020. doi: 10.1161/STROKEAHA.120.030153Google Scholar13. Tsivgoulis G, Katsanos AH, Zand R, Ishfaq MF, Malik MT, Karapanayiotides T, Voumvourakis K, Tsiodras S, Parissis J, et al. The association of adult vaccination with the risk of cerebrovascular ischemia: a systematic review and meta-analysis.J Neurol Sci. 2018; 386:12–18. doi: 10.1016/j.jns.2018.01.007CrossrefGoogle Scholar14. Tang N, Li D, Wang X, Sun Z. Abnormal coagulation parameters are associated with poor prognosis in patients with novel coronavirus pneumonia.J Thromb Haemost. 2020; 18:844–847. doi: 10.1111/jth.14768CrossrefMedlineGoogle Scholar15. Thachil J, Tang N, Gando S, Falanga A, Cattaneo M, Levi M. ISTH interim guidance on recognition and management of coagulopathy in COVID-19.J Thromb Haemost. 2020; 18:1023–1026. doi: 10.1111/jth.14810CrossrefMedlineGoogle Scholar16. Bikdeli B, Madhavan MV, Jimenez D, Chuich T, Dreyfus I, Driggin E, Der Nigoghossian C, Ageno W, Madjid M, Guo Y, et al. COVID-19 and thrombotic or thromboembolic disease: implications for prevention, antithrombotic therapy, and follow-up.J Am Coll Cardiol. 2020; pii:S0735–1097(20)35008-7. doi: 10.1016/j.jacc.2020.04.031Google Scholar17. Aggarwal G, Lippi G, Michael Henry B. Cerebrovascular disease is associated with an increased disease severity in patients with coronavirus disease 2019 (COVID-19): a pooled analysis of published literature.Int J Stroke. 2020. doi: 10.1177/1747493020921664Google Scholar18. Siegler JE, Heslin ME, Thau L, Smith A, Jovin TG. Falling stroke rates during COVID-19 pandemic at a comprehensive stroke center: cover title: falling stroke rates during COVID-19 [published online May 14, 2020].J Stroke Cerebrovasc Dis. doi: 10.1016/j.jstrokecerebrovasdis.2020.104953Google Scholar19. Pop R, Quenardelle V, Hasiu A, Mihoc D, Sellal F, Dugay MH. Impact of the COVID-19 outbreak on acute stroke pathways - insights from the Alsace region in France [published online May 12, 2020].Eur J Neurol. doi: 10.1111/ene.14316Google Scholar eLetters(0)eLetters should relate to an article recently published in the journal and are not a forum for providing unpublished data. Comments are reviewed for appropriate use of tone and language. 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