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Hsu J, Brown J, Mallick A, Fara M, De Leacy R, Rosen RB, Ginsburg RN, Lema GM. Successful Treatment of Central Retinal Artery Occlusion With Tissue Plasminogen Activator Followed by Recurrent Retinal Ischemia. JOURNAL OF VITREORETINAL DISEASES 2024; 8:622-626. [PMID: 39318984 PMCID: PMC11418660 DOI: 10.1177/24741264241267376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2024]
Abstract
Purpose: To describe the use of intra-arterial tissue plasminogen activator (tPA) to treat central retinal artery occlusion (CRAO). Methods: A case and its findings were analyzed. Results: A 45-year-old man diagnosed with a CRAO and had cerebral angiography and treatment with intra-arterial tPA. After treatment, follow-up included optical coherence tomography (OCT), fundus photography, fluorescein angiography, and OCT angiography. The visual acuity (VA) improved from hand motions to 20/30 immediately after fibrinolysis. A vascular occlusion event the next day resulted in a decrease in VA to 20/400. After initiation of dual antiplatelet therapy, the patient's VA improved to 20/20. As the retina recovered, the evolution of retinal ischemic changes to a finding similar to paracentral acute middle maculopathy was seen on imaging. Conclusions: This is the first report describing a patient safely started on dual antiplatelet therapy that led to vision improvement after initial treatment with intra-arterial tPA for a CRAO resulted in recurrent vision loss.
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Affiliation(s)
- Jerry Hsu
- Department of Ophthalmology, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
| | - Jeffrey Brown
- Department of Ophthalmology, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
| | | | - Michael Fara
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Reade De Leacy
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Richard B. Rosen
- Department of Ophthalmology, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
| | - Robin N. Ginsburg
- Department of Ophthalmology, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
| | - Gareth M.C. Lema
- Department of Ophthalmology, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
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Subah G, Xu P, Zeller S, Nolan B, Lui A, Fortunato M, Feldstein E, Kafina M, Schloss ER, Elefant D, Chong J, Gandhi C, Al-Mufti F. Nationwide Incidence and Trends in Central Retinal Arterial Occlusion Management: A 5000-Patient Analysis. Cardiol Rev 2024; 32:291-296. [PMID: 38666795 DOI: 10.1097/crd.0000000000000682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Central retinal artery occlusion (CRAO) is a rare and visually debilitating vascular condition characterized by sudden and severe vision loss. CRAO is a compelling target for intravenous alteplase (tPA) and endovascular mechanical thrombectomy (MT) due to pathophysiological similarities with acute ischemic stroke; however, the utility of these interventions in CRAO remains dubious due to limited sample sizes and potential risks. To assess usage and outcomes of tPA and MT in CRAO, we queried the National Inpatient Sample database using International Classification of Disease, Ninth and Tenth edition for patients with CRAO and acute ischemic stroke between 2010 and 2019. Our cohort of 5009 CRAO patients were younger with higher rates of obesity, hypertension, long-term anticoagulant use, and tobacco use compared to acute ischemic stroke patients. CRAO patients had lower rates of tPA administration (3.41% vs 6.21%) and endovascular MT (0.38% vs 1.31%) but fewer complications, including deep vein thrombosis, pneumonia, urinary tract infection, acute kidney injury, and acute myocardial infarction (all P < 0.01). CRAO patients had lower rates of poor functional outcome (31.74% vs 58.1%) and in-hospital mortality (1.2% vs 5.64%), but higher rates of profound blindness (9.24% vs 0.58%). A multivariate regression showed no relationship between tPA and MT and profound blindness, although the limited sample size of patients receiving interventions may have contributed to this apparent insignificance. Further investigation of larger patient cohorts and alternative treatment modalities could provide valuable insights for revascularization therapies in CRAO to optimize visual restoration and clinical outcomes.
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Affiliation(s)
- Galadu Subah
- From the Department of Neurosurgery, Westchester Medical Center, Valhalla, NY
| | - Patricia Xu
- School of Medicine, New York Medical College, Valhalla, NY
| | - Sabrina Zeller
- From the Department of Neurosurgery, Westchester Medical Center, Valhalla, NY
| | - Bridget Nolan
- School of Medicine, New York Medical College, Valhalla, NY
| | - Aiden Lui
- School of Medicine, New York Medical College, Valhalla, NY
| | | | - Eric Feldstein
- From the Department of Neurosurgery, Westchester Medical Center, Valhalla, NY
| | - Martin Kafina
- Department of Neurology, Westchester Medical Center, Valhalla, NY
| | - Evan R Schloss
- CareMount Medical Neurology, Putnam Hospital, Carmel, NY
| | - Daniel Elefant
- Department of Ophthalmology, Westchester Medical Center, Valhalla, NY
| | - Ji Chong
- Department of Neurology, Westchester Medical Center, Valhalla, NY
| | - Chirag Gandhi
- From the Department of Neurosurgery, Westchester Medical Center, Valhalla, NY
| | - Fawaz Al-Mufti
- Department of Neurology, Westchester Medical Center, Valhalla, NY
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Shah R, Zheng X, Patel AP, Bhatti MT, Gilbert A, Vora RA. Central Retinal Artery Occlusion: Visual Outcomes from a Large Northern California Cohort. Ophthalmol Retina 2024; 8:566-570. [PMID: 38154618 DOI: 10.1016/j.oret.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 12/30/2023]
Abstract
PURPOSE To assess visual acuity (VA) outcomes in a large cohort of patients diagnosed with nonarteritic central retinal artery occlusion (CRAO), and to ascertain whether time from symptom onset to presentation, presenting VA, or conservative treatment delivery (anterior chamber paracentesis, ocular massage, intraocular pressure lowering drugs, hyperventilation, or some combination of those) impacted ultimate VA outcomes. DESIGN Retrospective cohort study. SUBJECTS The study included 794 patients who presented with CRAO between 2011 and 2020. Within this cohort, 484 individuals presented within 30 days of symptom onset and had comprehensive documentation regarding the details of their presentation, management, and follow-up ≥ 90 days postdiagnosis. METHODS Retrospective chart review was conducted for all patients with a diagnosis of CRAO initially identified via International Classification of Diseases coding, followed by confirmation of diagnosis by 2 retina specialists. Cases of arteritic CRAO were excluded. MAIN OUTCOME MEASURES Visual acuity recovery, defined as improvement from ≤ 20/200 or worse at presentation to ≥ 20/100 ≥ 90 days after diagnosis. RESULTS Of the 794 identified patients, 712 (89.7%) presented with VA of ≤ 20/200. Similarly, 447 (92.4%) of the 484-patient subset that presented within 30 days and had comprehensive documentation presented with VA ≤ 20/200. Of the 441 of those patients with documented follow-up, 380 (86.2%) remained at that level. Of the 244 patients who presented within 4.5 hours of symptom onset, 227 (93%) presented ≤ 20/200 and 201 (92.6%) of the 217 of those with follow-up data did not improve beyond that threshold. There was no significant difference (P < 0.05) in final VA between patients presenting before versus after 4.5 hours from time of vision loss. There was also no significant difference (P < 0.05) in VA outcomes between patients who did or did not receive conservative treatment. CONCLUSIONS This large retrospective study further highlights the poor visual prognosis for patients with CRAO. Earlier time to presentation did not seem to impact final VA outcome, nor did conservative treatment efforts. Efficacious evidence-based treatment options are needed for this patient population. FINANCIAL DISCLOSURE(S) The author(s) have no proprietary or commercial interest in any materials discussed in this article.
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Affiliation(s)
- Ronak Shah
- Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Xuwen Zheng
- Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
| | - Amar P Patel
- Department of Ophthalmology, Kaiser Permanente Northern California, Oakland, California
| | - M Tariq Bhatti
- Department of Ophthalmology, Kaiser Permanente Northern California, Roseville, California
| | - Aubrey Gilbert
- Department of Ophthalmology, Kaiser Permanente Northern California, Vallejo, California
| | - Robin A Vora
- Department of Ophthalmology, Kaiser Permanente Northern California, Oakland, California.
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Liu Y, Cao S, Zhao Y, Wu T, Wang Q. Network Meta-Analysis of Different Thrombolytic Strategies for the Treatment of Central Retinal Artery Occlusion. Semin Ophthalmol 2024; 39:129-138. [PMID: 37644706 DOI: 10.1080/08820538.2023.2249539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 08/31/2023]
Abstract
PURPOSE Intravenous and intra-arterial thrombolytic strategies have been used to treat central retinal artery occlusion (CRAO); however, previous meta-analyses evaluated the efficacy of these two thrombolytic strategies separately but did not compare them. This network meta-analysis aimed to evaluate the comparative efficacy and safety of different thrombolytic methods for treating CRAO. METHODS We searched PubMed, Embase, the Cochrane Library, China National Knowledge Infrastructure (CNKI), and Wanfangdata to identify relevant studies published before 1 January 2023. We used the "network" command in STATA 14.0 software to perform network meta-analysis. In addition, we calculated the surface under the cumulative ranking (SUCRA) to rank all currently available thrombolytic strategies. RESULTS We included 12 studies in the final data analysis. Results suggested that, compared with standard treatment (ST), intravenous tissue plasminogen activator (IVtPA) (OR, 5.78; 95% CI, 2.07 to 16.11) and intra-arterial urokinase (IAUK) (OR, 2.78; 95% CI, 1.10 to 7.02) and intra-arterial tPA (IAtPA) (OR, 2.45; 95% CI, 1.04 to 5.77) achieved better visual improvement. The differences in visual improvement among IVtPA, IAUK, and IAtPA are insignificant. Furthermore, compared with ST, administration of IVtPA within 4.5 hours of CRAO onset (OR, 8.87; 95% CI, 3.35 to 23.48) rather than administration after 4.5 hours of onset (OR, 3.09; 95% CI, 0.81 to 11.70) achieved better visual improvement. In addition, compared to ST, all available thrombolytic strategies we evaluated were associated with a higher risk of adverse events, but these strategies did not differ. Based on the results of SUCRA, IVtPA had the highest ranking probability in visual improvement (91.9%) but had a relatively lower ranking probability of adverse events (60.1%). CONCLUSION Both intravenous and intra-arterial thrombolytic strategies are effective for treating CRAO, but SUCRA results show that IVtPA may be the optimal strategy for treating CRAO. Furthermore, based on the results of subgroup analysis, we further speculate that IVtPA injection within 4.5 hours of the onset of CRAO should be the optimal thrombolytic option for treating CRAO. However, due to the limitations of all eligible studies, more studies are still required in the future to validate our findings.
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Affiliation(s)
- Yong Liu
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing, PR China
| | - Shanshan Cao
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing, PR China
| | - Yanyan Zhao
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing, PR China
| | - Tengyun Wu
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing, PR China
| | - Quan Wang
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing, PR China
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Alhayek N, Sobczak JM, Vanood A, O’Carroll CB, Demaerschalk BM, Chen J, Dumitrascu OM. Thrombolytic Therapy for Central Retinal Artery Occlusion in an Academic Multi-Site Stroke Centre. Neuroophthalmology 2024; 48:111-121. [PMID: 38487357 PMCID: PMC10936677 DOI: 10.1080/01658107.2023.2290536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/20/2023] [Indexed: 03/17/2024] Open
Abstract
Central retinal artery occlusion (CRAO) is a subtype of acute ischaemic stroke leading to severe visual loss. A recent American Heart Association scientific statement proposed time-windows for thrombolysis in CRAO similar to acute ischaemic cerebral strokes. We aimed to review our academic multi-site stroke centre experience with intravenous (IVT) and intra-arterial thrombolysis (IAT) in CRAO between 1997 and 2022. Demographic, clinical characteristics, thrombolysis timeline, concurrent therapies, complications, and 3-month follow-up visual acuity (VA) were collected. The thrombolysed cohort follow-up VA was compared with an age, gender and baseline VA matched cohort of CRAO patients that received conservative therapies. Thrombolytic therapy was administered to 3.55% (n = 20) of CRAO admissions; 13 IVT (mean age 68, 61.5% male, 12 alteplase and 1 tenecteplase, all embolic aetiology, 1 CRAO mimic) and 7 IAT (mean age 55, 85.7% male, 3 post-operative and 3 embolic). Additional conservative CRAO-targeting therapies was received by 60%. The median time from onset of visual loss to IVT was 158 minutes (range 67-260). Improvement by at least two Snellen lines was achieved by 25% with 12.5% improving to 20/100 or better. Intracranial haemorrhage post IVT occurred in 1/13 (7.6%). The median time from onset of visual loss to IAT was 335 minutes. Improvement by at least two Snellen lines was achieved by 42%. No difference in 3-month VA was noted between patients that received thrombolysis, either alone (n = 8) or combined with other therapies, and those that received conservative therapies. Our results suggest that the management of acute CRAO remains heterogeneous. The lack of obvious benefit of thrombolysis in our small series supports the need for randomizsd clinical trials comparing thrombolysis to placebo to guide hyperacute CRAO management.
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Affiliation(s)
- Nour Alhayek
- Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, Arizona, USA
| | - Jacob M. Sobczak
- Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, Arizona, USA
| | - Aimen Vanood
- Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, Arizona, USA
| | - Cumara B. O’Carroll
- Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, Arizona, USA
| | - Bart M. Demaerschalk
- Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, Arizona, USA
- Center for Digital Health, Mayo Clinic, Rochester, Minnesota, USA
| | - John Chen
- Department of Ophthalmology and Neurology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Oana M. Dumitrascu
- Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, Arizona, USA
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6
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Shahjouei S, Bavarsad Shahripour R, Dumitrascu OM. Thrombolysis for central retinal artery occlusion: An individual participant-level meta-analysis. Int J Stroke 2024; 19:29-39. [PMID: 37424312 DOI: 10.1177/17474930231189352] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
BACKGROUND Whether thrombolysis improves outcomes in non-arteritic central retinal artery occlusion (naCRAO) is uncertain. We aimed to evaluate the rate of visual recovery after intra-venous thrombolysis (IVT) or intra-arterial thrombolysis (IAT) administration of tissue plasminogen activator (tPA) or urokinase among patients with naCRAO and explore the parameters affecting the final visual acuity (VA). AIM We systematically searched six databases. Logarithm of the minimum angle of resolution (logMAR) and VA of ⩾20/100 were used to quantify visual recovery. To explore the role of other factors on visual recovery, we defined two models for studies with aggregated data (designs 1 and 2) and 16 models for individual participant data (IPD, models 1-16). SUMMARY OF REVIEW We included data from 771 patients out of 72 publications in nine languages. Visual improvement for ⩾0.3 logMAR was reported in 74.3% of patients who received IVT-tPA within 4.5 h (CI: 60.9-86.0%; unadjusted rate: 73.2%) and 60.0% of those who received IAT-tPA within 24 h (CI: 49.1-70.5%; unadjusted rate: 59.6%). VA of ⩾20/100 was observed among 39.0% of patients after IVT-tPA within 4.5 h and 21.9% of those with IAT-tPA within 24 h. IPD models highlighted the association between improved visual outcomes and VA at presentation, at least 2 weeks follow-up before reporting the final VA, antiplatelet therapy, and shorter symptom onset to thrombolysis window. CONCLUSION Early thrombolytic therapy with tPA is associated with enhanced visual recovery in naCRAO. Future studies should refine the optimum time window for thrombolysis in naCRAO.
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Affiliation(s)
- Shima Shahjouei
- Department of Neurology, Penn State Health Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Neurology, Neurosurgery, and Translational Medicine, Barrow Neurological Institute, St. Joseph's Hospital, Phoenix, AZ, USA
| | - Reza Bavarsad Shahripour
- UCSD Comprehensive Stroke Center, Department of Neurosciences, University of California, San Diego, CA, USA
- Department of Neurology, Stroke Center, Loma Linda University, Loma Linda, CA, USA
| | - Oana M Dumitrascu
- Division of Cerebrovascular Diseases, Department of Neurology, Mayo Clinic College of Medicine and Science, Scottsdale, AZ, USA
- Department of Ophthalmology, Mayo Clinic College of Medicine and Science, Scottsdale, AZ, USA
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Baumgartner P, Kook L, Altersberger VL, Gensicke H, Ardila-Jurado E, Kägi G, Salerno A, Michel P, Gopisingh KM, Nederkoorn PJ, Scheitz JF, Nolte CH, Heldner MR, Arnold M, Cordonnier C, Della Schiava L, Hametner C, Ringleb PA, Leker RR, Jubran H, Luft AR, Engelter ST, Wegener S. Safety and effectiveness of IV Thrombolysis in retinal artery occlusion: A multicenter retrospective cohort study. Eur Stroke J 2023; 8:966-973. [PMID: 37421135 PMCID: PMC10683723 DOI: 10.1177/23969873231185895] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 06/13/2023] [Indexed: 07/09/2023] Open
Abstract
BACKGROUND Retinal artery occlusion (RAO) may lead to irreversible blindness. For acute RAO, intravenous thrombolysis (IVT) can be considered as treatment. However, due to the rarity of RAO, data about IVT safety and effectiveness is limited. METHODS From the multicenter database ThRombolysis for Ischemic Stroke Patients (TRISP), we retrospectively analyzed visual acuity (VA) at baseline and within 3 months in IVT and non-IVT treated RAO patients. Primary outcome was difference of VA between baseline and follow up (∆VA). Secondary outcomes were rates of visual recovery (defined as improvement of VA ⩾ 0.3 logMAR), and safety (symptomatic intracranial hemorrhage (sICH) according to ECASS II criteria, asymptomatic intracranial hemorrhage (ICH) and major extracranial bleeding). Statistical analysis was performed using parametric tests and a linear regression model adjusted for age, sex and baseline VA. RESULTS We screened 200 patients with acute RAO and included 47 IVT and 34 non-IVT patients with complete information about recovery of vision. Visual Acuity at follow up significantly improved compared to baseline in IVT patients (∆VA 0.5 ± 0.8, p < 0.001) and non-IVT patients (∆VA 0.40 ± 1.1, p < 0.05). No significant differences in ∆VA and visual recovery rate were found between groups at follow up. Two asymptomatic ICH (4%) and one (2%) major extracranial bleeding (intraocular bleeding) occurred in the IVT group, while no bleeding events were reported in the non-IVT group. CONCLUSION Our study provides real-life data from the largest cohort of IVT treated RAO patients published so far. While there is no evidence for superiority of IVT compared to conservative treatment, bleeding rates were low. A randomized controlled trial and standardized outcome assessments in RAO patients are justified to assess the net benefit of IVT in RAO.
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Affiliation(s)
- Philipp Baumgartner
- Department of Neurology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Lucas Kook
- Epidemiology, Biostatistics & Prevention Institute, University of Zurich, Zurich, Switzerland
- Institute for Data Analysis and Process Design, Zurich University of Applied Sciences, Winterthur, Switzerland
| | - Valerian L Altersberger
- Stroke Center and Department of Neurology, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Henrik Gensicke
- Stroke Center and Department of Neurology, University Hospital Basel and University of Basel, Basel, Switzerland
- Neurology and Neurorehabilitation, University Department of Geriatric Medicine Felix Platter, University of Basel, Basel, Switzerland
| | | | - Georg Kägi
- Department of Neurology, Kantonsspital St. Gallen, Switzerland
- Department of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Alexander Salerno
- Stroke Center, Neurology Service, Lausanne University Hospital, Lausanne, Switzerland
| | - Patrik Michel
- Stroke Center, Neurology Service, Lausanne University Hospital, Lausanne, Switzerland
| | - Kiran M Gopisingh
- Department of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Paul J Nederkoorn
- Department of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Jan F Scheitz
- Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Germany and Center for Stroke Research Berlin (CSB), Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Christian H Nolte
- Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Germany and Center for Stroke Research Berlin (CSB), Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Mirjam R Heldner
- Department of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Marcel Arnold
- Department of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Charlotte Cordonnier
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - Lucie Della Schiava
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | | | - Peter A. Ringleb
- Department of Neurology, University Hospital Heidelberg, Germany
| | - Ronen R Leker
- Department of Neurology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Hamza Jubran
- Department of Neurology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Andreas R Luft
- Department of Neurology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
- Cereneo Center for Neurology and Rehabilitation, Vitznau, Switzerland
| | - Stefan T Engelter
- Stroke Center and Department of Neurology, University Hospital Basel and University of Basel, Basel, Switzerland
- Neurology and Neurorehabilitation, University Department of Geriatric Medicine Felix Platter, University of Basel, Basel, Switzerland
| | - Susanne Wegener
- Department of Neurology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
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Lin JC, Song SL, Ng SM, Scott IU, Greenberg PB. Treatments for Acute Nonarteritic Central Retinal Artery Occlusion: Findings From a Cochrane Systematic Review. Ophthalmic Surg Lasers Imaging Retina 2023; 54:650-653. [PMID: 37855834 DOI: 10.3928/23258160-20230922-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Many interventions for nonarteritic central retinal artery occlusion (CRAO) are associated with serious complications and little effect on visual outcomes. We report on the findings of a Cochrane systematic review that searched seven databases for peer-reviewed articles reporting on treatments for acute nonarteritic CRAO. We assessed six randomized controlled trials, including interventions such as tissue plasminogen activator (t-PA), isovolumic hemodilution, eyeball massage, intraocular pressure reduction, anticoagulation, vasodilation, oxygen inhalation, laser embolysis, transcorneal electrical stimulation, thrombolysis, pentoxifylline, and enhanced external counterpulsation. However, none of the randomized controlled trials demonstrated significant improvement in visual acuity at 1 month compared to observation, and some patients treated with t-PA experienced serious adverse effects including intracranial hemorrhage. Proposed interventions for acute nonarteritic CRAO may not be better than observation, but the evidence is uncertain. Larger, well-designed studies are necessary to determine the most effective management option for acute nonarteritic CRAO. [Ophthalmic Surg Lasers Imaging Retina 2023;54:650-653.].
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9
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Dziedzic R, Zaręba L, Iwaniec T, Kubicka-Trząska A, Romanowska-Dixon B, Bazan-Socha S, Dropiński J. High prevalence of thrombophilic risk factors in patients with central retinal artery occlusion. Thromb J 2023; 21:81. [PMID: 37507715 PMCID: PMC10386273 DOI: 10.1186/s12959-023-00525-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/24/2023] [Indexed: 07/30/2023] Open
Abstract
INTRODUCTION Central retinal artery occlusion (CRAO) is a common cause of blindness and visual morbidity. In the majority of cases, it is related to thrombotic embolism. Nevertheless, the role of inherited or acquired thrombophilic risk factors in CRAO pathogenesis has not been comprehensively studied. METHODS In 126 CRAO patients (66 [52.4%] men, median age 55 [range: 18-80] years) and 107 matched controls (56 [52.3%] men, median age 53 [range: 34-78] years) we evaluated classical atherosclerotic risk factors, including serum lipid profile and glucose level, analyzed intima-media complex thickness (IMT) of external carotid arteries, and performed transthoracic echocardiography. Furthermore, we established the prevalence of inherited and acquired thrombophilic risk factors, such as factor V Leiden (FVL) and prothrombin 20210 G/A genetic variants, plasma activity of factor (F) VIII, protein C and antithrombin activity, and free protein S levels. We also assessed the presence of antiphospholipid antibodies (APLA) and evaluated blood homocysteine in all enrolled subjects. Additionally, we estimated the occurrence of Val34Leu polymorphism of the A subunit of coagulation factor XIII (FXIII-A) in both groups as a potential thrombosis-protecting factor. RESULTS Among traditional atherosclerotic risk components, obesity/overweight and hypercholesterolemia were the most common in the CRAO group and occurred in 103 (81.7%) and 85 (67.5%) patients, respectively. CRAO patients also had elevated IMT and altered echocardiographic parameters, indicating diastolic cardiac dysfunction. In thrombophilia investigations, at least one laboratory risk factor occurred in 72.2% (n = 91) of CRAO patients, with APLA as the most frequent, detected in 38.1% (n = 48) of them (almost seven times more frequent than in controls, p < 0.001). Deficiencies in protein C activity and free protein S levels were also common in the CRAO group, reported in 17.5% (n = 22) and 19.8% (n = 25) of patients, respectively. Interestingly, among two analyzed prothrombotic genetic variants, only the FVL was related to CRAO, with the allelic frequency 2.4 times more prevalent than in controls (p = 0.044). Finally, the CRAO group was characterized by hyperhomocysteinemia, almost twice as common as in controls (p = 0.026). Antithrombin deficiency, elevated FVIII, and FXIII-A Val34Leu polymorphism were not associated with CRAO. CONCLUSIONS Our findings suggest that thrombophilia plays a vital role in the pathogenesis of CRAO. Thus, proper laboratory screening should be considered in the primary and secondary prevention of those episodes, with implementing appropriate therapy as needed.
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Affiliation(s)
- Radosław Dziedzic
- Doctoral School of Medical and Health Sciences, Jagiellonian University Medical College, Łazarza 16, Krakow, 31-530, Poland
- Department of Internal Medicine, Faculty of Medicine, Jagiellonian University Medical College, Jakubowskiego 2, Krakow, 30-688, Poland
| | - Lech Zaręba
- College of Natural Sciences, Institute of Computer Science, University of Rzeszow, Pigonia 1, Rzeszow, 35-310, Poland
| | - Teresa Iwaniec
- Department of Hematology, Jagiellonian University Medical College, Kopernika 17, Krakow, 31-501, Poland
| | - Agnieszka Kubicka-Trząska
- Faculty of Medicine, Department of Ophthalmology, Clinic of Ophthalmology and Ocular Oncology of University Hospital, Jagiellonian University Medical College, Kopernika 38, Krakow, 31-501, Poland
| | - Bożena Romanowska-Dixon
- Faculty of Medicine, Department of Ophthalmology, Clinic of Ophthalmology and Ocular Oncology of University Hospital, Jagiellonian University Medical College, Kopernika 38, Krakow, 31-501, Poland
| | - Stanisława Bazan-Socha
- Department of Internal Medicine, Faculty of Medicine, Jagiellonian University Medical College, Jakubowskiego 2, Krakow, 30-688, Poland
| | - Jerzy Dropiński
- Department of Internal Medicine, Faculty of Medicine, Jagiellonian University Medical College, Jakubowskiego 2, Krakow, 30-688, Poland.
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Lam MSH, Luoma AMV, Reddy U. Acute perioperative neurological emergencies. Int Anesthesiol Clin 2023; 61:53-63. [PMID: 37249171 DOI: 10.1097/aia.0000000000000404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Michelle S H Lam
- Department of Neuroanaesthesia and Neurocritical Care, The National Hospital for Neurology and Neurosurgery, London, UK
| | - Astri M V Luoma
- Department of Neuroanaesthesia and Neurocritical Care, The National Hospital for Neurology and Neurosurgery, London, UK
- Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, UK
| | - Ugan Reddy
- Department of Neuroanaesthesia and Neurocritical Care, The National Hospital for Neurology and Neurosurgery, London, UK
- Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, UK
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11
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Lin JC, Song S, Ng SM, Scott IU, Greenberg PB. Interventions for acute non-arteritic central retinal artery occlusion. Cochrane Database Syst Rev 2023; 1:CD001989. [PMID: 36715340 PMCID: PMC9885744 DOI: 10.1002/14651858.cd001989.pub3] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Acute non-arteritic central retinal artery occlusion (CRAO) occurs as a sudden interruption of the blood supply to the retina and typically results in severe loss of vision in the affected eye. Although many therapeutic interventions have been proposed, there is no generally agreed upon treatment regimen. OBJECTIVES To assess the effects of treatments for acute non-arteritic CRAO. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (which contains the Cochrane Eyes and Vision Trials Register) (2022, Issue 2); Ovid MEDLINE; Embase.com; PubMed; Latin American and Caribbean Health Sciences Literature Database (LILACS); ClinicalTrials.gov; and the World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP). We did not use any date or language restrictions in the electronic search for trials. We last searched the electronic databases on 15 February 2022. SELECTION CRITERIA We included randomized controlled trials (RCTs) comparing any interventions with another treatment in participants with acute non-arteritic CRAO in one or both eyes. DATA COLLECTION AND ANALYSIS: We used standard Cochrane methodology and graded the certainty of the body of evidence for primary (mean change in best-corrected visual acuity [BCVA]) and secondary (quality of life and adverse events) outcomes using the GRADE classification. MAIN RESULTS We included six RCTs with 223 total participants with acute non-arteritic CRAO; the studies ranged in size from 10 to 84 participants. The included studies varied geographically: one in Australia, one in Austria and Germany, two in China, one in Germany, and one in Italy. We were unable to conduct any meta-analyses due to study heterogeneity. None of the included studies compared the same pair of interventions: 1) tissue plasminogen activator (t-PA) versus intravenous saline; 2) t-PA versus isovolemic hemodilution, eyeball massage, intraocular pressure reduction, and anticoagulation; 3) nitroglycerin, methazolamide, mecobalamin tablets, vitamin B1 and B12 injections, puerarin and compound anisodine (also known as 654-2) along with oxygen inhalation, eyeball massage, tube expansion, and anticoagulation compared with and without intravenous recombinant tissue plasminogen activator (rt-PA); 4) transcorneal electrical stimulation (TES) with 0 mA versus with 66% of the participant's individual electrical phosphene threshold (EPT) at 20 Hz (66%) versus with 150% of the participant's individual EPT (150%) at 20 Hz; 5) ophthalmic artery branch retrograde thrombolysis versus superselective ophthalmic artery thrombolysis; and 6) pentoxifylline versus placebo. There was no evidence of an important difference in visual acuity between participants treated with t-PA versus intravenous saline (mean difference [MD] at 1 month -0.15 logMAR, 95% confidence interval [CI] -0.48 to 0.18; 1 study, 16 participants; low certainty evidence); t-PA versus isovolemic hemodilution, eyeball massage, intraocular pressure reduction, and anticoagulation (MD at 1 month -0.00 logMAR, 95% CI -0.24 to 0.23; 1 study, 82 participants; low certainty evidence); and TES with 0 mA versus TES with 66% of EPT at 20 Hz versus TES with 150% of EPT at 20 Hz. Participants treated with t-PA experienced higher rates of serious adverse effects. The other three comparisons did not report statistically significant differences. Other studies reported no data on secondary outcomes (quality of life or adverse events). AUTHORS' CONCLUSIONS: The current research suggests that proposed interventions for acute non-arteritic CRAO may not be better than observation or treatments of any kind such as eyeball massage, oxygen inhalation, tube expansion, and anticoagulation, but the evidence is uncertain. Large, well-designed RCTs are necessary to determine the most effective treatment for acute non-arteritic CRAO.
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Affiliation(s)
- John C Lin
- Division of Ophthalmology, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Sophia Song
- Division of Ophthalmology, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Sueko M Ng
- Department of Ophthalmology, University of Colorado Denver - Anschutz Medical Campus, Aurora, Colorado, USA
| | - Ingrid U Scott
- Departments of Ophthalmology and Public Health Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA
| | - Paul B Greenberg
- Section of Ophthalmology, VA Medical Center, Providence, Rhode Island, USA
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12
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Huang L, Wang Y, Zhang R. Efficacy and safety of intra-arterial thrombolysis in patients with central retinal artery occlusion: a systematic review and meta-analysis. Graefes Arch Clin Exp Ophthalmol 2023; 261:103-113. [PMID: 35947182 DOI: 10.1007/s00417-022-05797-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 07/27/2022] [Accepted: 08/01/2022] [Indexed: 01/10/2023] Open
Abstract
PURPOSE To investigate the efficacy and safety of intra-arterial thrombolysis (IAT) in patients with central retinal artery occlusion (CRAO). METHODS PubMed and EMBASE were searched for potentially eligible studies that reported IAT in CRAO patients from inception to Nov 8, 2021. Standard mean difference (SMD) was pooled to compare visual acuity (VA) at baseline with final in IAT patients. The rates and odds ratios (OR) were meta-analyzed to compare VA improvement in IAT with non-IAT patients, stratified to different times from onset to procedure, different definitions of VA improvement, and three CRAO stages. Adverse effects were recorded. RESULTS Fifteen studies were included, enrolling 507 CRAO patients who received IAT and 296 CRAO patients who did not. VA was significantly improved from baseline to final VA in IAT patients (SMD [LogMAR] 0.70, 95% CI [0.51, 0.90]). VA improvement rate was higher in IAT patients than that in non-IAT (56% vs 32%, OR 3.55, 95%CI [1.74, 7.24]), with greater OR in IAT within 6 h from onset to procedure (OR 4.60, 95%CI [1.24, 16.99]) than that beyond 6 h (OR 3.36, 95%CI [1.43, 7.85]). The benefit remained consistent when VA improvement was defined as ≥ 3 lines on the Snellen chart (OR 4.68, 95%CI [2.10, 10.41]) and was even greater when CRAO was incomplete. Five patients had a symptomatic intracranial hemorrhage and 21 patients had ischemic stroke or transient ischemic attack after IAT. CONCLUSIONS IAT treatment has certain potential in ameliorating VA in CRAO patients, which should be balanced against cerebral complications.
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Affiliation(s)
- Lele Huang
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, 155 Nanjingbei Street, Heping District, Shenyang, 110001, People's Republic of China
| | - Yujie Wang
- Department of Neurology, People's Hospital of Liaoning Province, 33 Wenyi Road, Shenhe District, Shenyang, 110016, People's Republic of China
| | - Ruijun Zhang
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, 155 Nanjingbei Street, Heping District, Shenyang, 110001, People's Republic of China.
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13
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[Retinal arterial occlusions (RAV) : S2e guidelines of the German Society of Ophthalmology (DOG), the German Retina Society (RG) and the German Professional Association of Ophthalmologists (BVA). Version: 7 October 2022]. DIE OPHTHALMOLOGIE 2023; 120:15-29. [PMID: 36525048 DOI: 10.1007/s00347-022-01780-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/14/2022] [Indexed: 12/23/2022]
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14
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Casagrande M, Steinhorst NA, Dippel SK, Kück F, Grohmann C, Spitzer MS, Poli S, Feltgen N, Schultheiss M. Central retinal artery occlusion - detection score. Front Med (Lausanne) 2023; 10:1129002. [PMID: 36936219 PMCID: PMC10014563 DOI: 10.3389/fmed.2023.1129002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 02/07/2023] [Indexed: 03/05/2023] Open
Abstract
Purpose To investigate the sensitivity and specificity of central retinal artery occlusion (CRAO)-Detection Score in diagnosing CRAO via questionnaire and without fundoscopy. Methods This prospective study enrolled 176 emergency patients suffering from acute visual loss, of whom 38 were suffering from CRAO. Before conducting any examination, we administered our questionnaire containing six questions, followed by a thorough ophthalmologic examination to make the diagnosis. Statistical analysis involved a LASSO penalised multivariate logistic regression model. Results Our receiver operating characteristic (ROC) analysis based on a LASSO penalised multivariate logistic regression model showed an area under the curve (AUC) of 0.9 - three out of six questions were selected by LASSO. Interestingly, the unweighted ROC analysis of only two questions (Short CRAO-Detection Score) yielded similar results with an AUC of 0.88. The short CRAO-Detection Score of 2 yielded 14% (4/28) false positive patients. Conclusion This prospective study demonstrates that a high percentage of CRAO patients are detectable with a questionnaire. The CRAO-Detection Score might be used to triage patients suffering acute visual loss, which is important as intravenous fibrinolysis seem to be time-dependent to be effective.
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Affiliation(s)
- Maria Casagrande
- Department of Ophthalmology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | | | | | - Fabian Kück
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - Carsten Grohmann
- Department of Ophthalmology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Martin S. Spitzer
- Department of Ophthalmology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Sven Poli
- Department of Neurology and Stroke, University of Tübingen, Tübingen, Germany
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Nicolas Feltgen
- Department of Ophthalmology, University Medical Center Göttingen, Göttingen, Germany
| | - Maximilian Schultheiss
- Department of Ophthalmology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
- *Correspondence: Maximilian Schultheiss,
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Parikh P, Mohamed M, Bat T, Nero A, Wang A, Yates SG, Ufret-Vincenty RL. Parafoveal acute middle maculopathy (PAMM) in sickle cell disease after discontinuation of hydroxyurea. Am J Ophthalmol Case Rep 2022; 28:101753. [DOI: 10.1016/j.ajoc.2022.101753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/22/2022] [Accepted: 11/03/2022] [Indexed: 11/13/2022] Open
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Lin CW, Lai TT, Chen SJ, Lin CH. Elevated α-synuclein and NfL levels in tear fluids and decreased retinal microvascular densities in patients with Parkinson's disease. GeroScience 2022; 44:1551-1562. [PMID: 35484471 DOI: 10.1007/s11357-022-00576-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/19/2022] [Indexed: 12/21/2022] Open
Abstract
The pathognomonic hallmark of Parkinson's disease (PD), α-synuclein, has been observed in the retina of PD patients. We investigated whether biomarkers in the tears and retinal microvascular changes associate with PD risk and progression. This prospective study enrolled 49 PD patients and 45 age-matched healthy controls. The α-synuclein and neurofilament light chain (NfL) levels were measured using an electrochemiluminescence immunoassay. Retinal vessel density was assessed using optical coherence tomography angiography (OCT-A). The Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) and Mini-Mental State Examination score were used to assess motor and cognitive progression. The α-synuclein and NfL levels in the tears were higher in PD patients than in controls (α-synuclein: 55.49 ± 8.12 pg/mL vs. 31.71 ± 3.25 pg/mL, P = 0.009; NfL: 2.89 ± 0.52 pg/mL vs. 1.47 ± 0.23 pg/mL, P = 0.02). The vessel densities in the deep plexus of central macula and the radial peripapillary capillary layer of disc region were lower in PD patients with moderate-stage compared with early-stage PD (P < 0.05). The accuracy of predicting PD occurrence using age and sex alone (area under the curve [AUC] 0.612) was significantly improved by adding α-synuclein and NfL levels and retinal vascular densities (AUC 0.752, P = 0.001). After a mean follow-up of 1.5 ± 0.3 years, the accuracy of predicting motor or cognitive progression using age, sex, and baseline motor severity as a basic model was increased by incorporating retinal microvascular and biofluid markers as a full model (P = 0.001). Our results showed that retinal microvascular densities combined with α-synuclein and NfL levels in tears are associated with risk and progression of PD.
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Affiliation(s)
- Chao-Wen Lin
- Department of Ophthalmology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Tzu-Ting Lai
- Department of Ophthalmology, En Chu Kong Hospital, New Taipei City, Taiwan
| | - Szu-Ju Chen
- Department of Neurology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, 100, Taiwan.,Department of Neurology, National Taiwan University Hospital Bei-Hu Branch, Taipei, Taiwan
| | - Chin-Hsien Lin
- Department of Neurology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, 100, Taiwan.
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Meta-Analysis of the Effectiveness and Safety of Intravenous Thrombolysis in Patients with Acute Cerebral Infarction. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2021; 2021:2833043. [PMID: 34917165 PMCID: PMC8670916 DOI: 10.1155/2021/2833043] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/18/2021] [Accepted: 11/26/2021] [Indexed: 01/05/2023]
Abstract
In this paper, a meta-analysis of the effectiveness and safety of intravenous thrombolysis in patients with acute cerebral infarction was carried out, the original literature inclusion criteria and retrieval strategies were developed, and the collection deadline was about new oral anticoagulants and other methods for the antithrombotic intravenous thrombolytic treatment of patients with acute cerebral infarction for the relevant literature on the safety and effectiveness comparison. First, the quality of the literature is evaluated according to whether the included studies are randomized controlled trials, whether there is randomized concealment, whether blinding is used, and whether they are withdrawn or lost to follow-up, and the RevMan 5.2 software is used for meta-analysis. At the same time, grey literature databases such as dissertations were experimentally searched, and all randomized controlled studies (RCT), nonrandomized controlled studies, case-controlled studies, cohort studies, case series reports, etc. of Wingspan in the treatment of intracranial atherosclerotic stenosis were collected. In the prevention of myocardial infarction in patients with acute cerebral infarction, the difference between the two was not statistically significant (RR = 0.82, 95% CI (0.57, 1.17), P = 0.27). Compared with other methods, it can significantly reduce the all-cause mortality of patients with nonvalvular venous thrombolysis, and the difference is statistically significant (RR = 0.90, 95% CI (0.85, 0.96), P = 0.001). Experimental results show that in terms of safety, the new oral anticoagulant is better than other methods in reducing minor bleeding in patients with acute cerebral infarction, and the difference is statistically significant (RR = 0.87, 95% CI (0.76, 0 99), P = 0.03); the effect is better than other methods in reducing the incidence of serious bleeding events, and the difference is statistically significant (RR = 0.79, 95% CI (0.74, 0.85), P < 0.00001).
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