scholarly journals Role of D-Dimer in Stroke: A Systematic Review

2022 ◽  
Vol 05 (01) ◽  
Author(s):  
Eraky AM ◽  
Osula F ◽  
Aboaba AO ◽  
Rasheed M ◽  
Khalid KN ◽  
...  
Keyword(s):  
Systematic Review ◽  
D Dimer

scholarly journals Elevated D-Dimer Levels are Associated with Increased Risk of Mortality in COVID-19: A Systematic Review and Meta-Analysis

2020 ◽  
Author(s):  
Siddharth Shah ◽  
Kuldeep Shah ◽  
Siddharth B Patel ◽  
Forum S Patel ◽  
Mohammed Osman ◽  
...  
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Severe Disease ◽  
Case Fatality ◽  
Inclusion Criteria ◽  
Risk Of Mortality ◽  
Increased Risk ◽  
Novel Coronavirus ◽  
D Dimer

AbstractIntroductionThe 2019 novel Coronavirus (2019-nCoV), now declared a pandemic has an overall case fatality of 2–3% but it is as high as 50% in critically ill patients. D-dimer is an important prognostic tool, often elevated in patients with severe COVID-19 infection and in those who suffered death. In this systematic review, we aimed to investigate the prognostic role of D-dimer in COVID-19 infected patients.MethodsWe searched PubMed, Medline, Embase, Ovid, and Cochrane for studies reporting admission D-dimer levels in COVID-19 patients and its effect on mortality.Results18 studies (16 retrospective and 2 prospective) with a total of 3,682 patients met the inclusion criteria. The pooled mean difference (MD) suggested significantly elevated D-dimer levels in patients who died versus those survived (MD 6.13 mg/L, 95% CI 4.16 − 8.11, p <0.001). Similarly, the pooled mean D-dimer levels were significantly elevated in patients with severe COVID-19 infection (MD 0.54 mg/L, 95% CI 0.28 − 0.8, p< 0.001). In addition, the risk of mortality was four-fold higher in patients with positive D-dimer vs negative D-dimer (RR 4.11, 95% CI 2.48 − 6.84, p< 0.001) and the risk of developing the severe disease was two-fold higher in patients with positive D-dimer levels vs negative D-dimer (RR 2.04, 95% CI 1.34 − 3.11, p < 0.001).ConclusionOur meta-analysis demonstrates that patients with COVID-19 presenting with elevated D-dimer levels have an increased risk of severe disease and mortality.

scholarly journals Coagulopathy in patients with Coronavirus Disease 2019 (COVID-19): A systematic review and meta-analysis

2020 ◽  
Author(s):  
Xiaolin Zhang ◽  
Xue Yang ◽  
Hongmei Jiao ◽  
Xinmin Liu
Keyword(s):  
Systematic Review ◽  
Literature Search ◽  
Meta Analysis ◽  
Statistical Analyses ◽  
Systematic Literature Search ◽  
Coagulation Parameters ◽  
Coagulation Abnormalities ◽  
D Dimer

Patients with COVID-19 frequently manifest coagulation abnormalities and thrombotic events. In this meta-analysis, we aimed to explore the role of coagulopathy on the severity differences in patients with COVID-19. We conducted systematic literature search via Pubmed, Embase, Cochrane, WanFang Database, CNKI, and medRxiv from December 1, 2019 to May 1, 2020, to identify all original studies that reports on coagulation parameters (D-dimer, PLT, PT, APTT, and FIB) during COVID-19 infection. Thereafter, we compared the coagulation parameters between less severe and more severe cases. All Statistical analyses were performed via Stata14.0 software. A total of 3,952 confirmed COVID-19 infected patients were included from 25 studies. Patients with severe COVID-19 infection exhibited significantly higher levels of D-dimer, PT, and FIB (SMD 0.83, 95% CI: 0.70-0.97, I2 56.9%; SMD 0.39, 95% CI: 0.14-0.64, I2 77.9%; SMD 0.35, 95% CI: 0.17-0.53, I2 42.4% respectively). However, difference in PLT and APTT levels between less severe and more severe patients was not statistically significant (SMD-0.26, 95% CI: -0.56-0.05, I2 82.2%; SMD-0.14,95% CI: -0.45-0.18, I2 75.5% respectively) This meta-analysis revealed coagulopathy is associated with the severity of COVID-19. Notably, D-dimer, PT, and FIB are the dominant parameters that should be considered in evaluating coagulopathy in COVID-19 patients.

scholarly journals Role of D-Dimer in the Risk Stratification of Acute Coronary Syndrome Patients: Implications for Antithrombotic Treatment. A Systematic Review and Exploratory Meta-analysis.

2021 ◽  
Author(s):  
Flavio Giuseppe Biccirè ◽  
Alessio Farcomeni ◽  
Carlo Gaudio ◽  
Pasquale Pignatelli ◽  
Gaetano Tanzilli ◽  
...  
Keyword(s):  
Systematic Review ◽  
Acute Coronary Syndrome ◽  
Poor Prognosis ◽  
Positive Association ◽  
Current Evidence ◽  
Thrombotic Risk ◽  
Coronary Syndrome ◽  
D Dimer

Abstract Background Data on the prognostic role of D-dimer in patients with acute coronary syndrome (ACS) are controversial. Our aim was to summarize current evidence on the association between D-dimer levels and short/long-term poor prognosis of ACS patients. We also investigated the association between D-Dimer and no-reflow (NR) phenomenon.Methods Systematic review and metanalysis of observational studies including ACS patients and reporting data on D-Dimer levels. PubMed and SCOPUS databases were searched. Data were combined with hazard ratio (HR) and metanalysed. The principal endpoint was a composite of cardiovascular events (CVEs) including myocardial infarction, all-cause and cardiovascular mortality. Results Overall, 32 studies included in the systematic review with 28,869 patients. Of them, 6 studies investigated in-hospital and 26 studies long-term outcomes. Overall, 23 studies showed positive association of high D-Dimer levels with CVEs. D-Dimer levels predicted poor prognosis in all studies reporting in-hospital outcomes. Five studies satisfied inclusion criteria and were included in the metanalysis, with a total of 8,616 patients. Median follow-up was 13.2 months with 626 CVEs. The pooled HR for D-dimer levels and CVEs was 1.264 (95% CI 1.134-1.409). Five out of 7 studies (4,195 STEMI patients) investigating the association between D-Dimer levels and NR showed a positive correlation of D-dimer levels with NR. Conclusions In patients with ACS D-Dimer was associated with higher in-hospital and short/long-term complications. D-Dimer was also higher in patients with NR phenomenon. The use of D-Dimer may help to identify patients with residual thrombotic risk after ACS.Trial registration: the review protocol was registered in PROSPERO International Prospective Register of Systematic Reviews: CRD42021267233.

A literature review on firms' internationalisation through e-commerce

2019 ◽  
pp. 121-143
Author(s):  
Riccardo Resciniti ◽  
Federica De Vanna
Keyword(s):  
Systematic Review ◽  
Literature Review ◽  
International Business ◽  
Decision Process ◽  
Foreign Markets ◽  
New Markets ◽  
Integrative Framework ◽  
The Past ◽  
The Relationship

The rise of e-commerce has brought considerable changes to the relationship between firms and consumers, especially within international business. Hence, understanding the use of such means for entering foreign markets has become critical for companies. However, the research on this issue is new and so it is important to evaluate what has been studied in the past. In this study, we conduct a systematic review of e-commerce and internationalisation studies to explicate how firms use e-commerce to enter new markets and to export. The studies are classified by theories and methods used in the literature. Moreover, we draw upon the internationalisation decision process (antecedents-modalities-consequences) to propose an integrative framework for understanding the role of e-commerce in internationalisation

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