ThrombosisPub Date : 2013-01-01Epub Date: 2013-12-18DOI: 10.1155/2013/516420
Elisabeth M Battinelli, Ariela Marshall, Jean M Connors
{"title":"The role of thrombophilia in pregnancy.","authors":"Elisabeth M Battinelli, Ariela Marshall, Jean M Connors","doi":"10.1155/2013/516420","DOIUrl":"https://doi.org/10.1155/2013/516420","url":null,"abstract":"<p><p>Thrombotic disease is a major cause of peripartum morbidity and mortality worldwide. Development of thrombosis in pregnancy is multifactorial due to the physiologic changes of pregnancy-which induce a relative hypercoagulable state-as well as physical changes leading to increased stasis and also the effects of both the inherited and the acquired thrombophilias. In this review, we discuss the impact of each of these factors on the development of thrombosis as well as the evidence for the impact of pregnancy-associated thrombosis on pregnancy outcome. We then discuss the use of both prophylactic and therapeutic anticoagulation during pregnancy and the puerperium. We review the indications and dosing recommendations for administration of anticoagulation in a context of discussing the evidence including the lack of evidence and formal guidelines in this area. We briefly address the role of the new oral anticoagulants in pregnancy and conclude that significant further research in women with thrombophilias and pregnancy-associated thrombosis may help clarify the management of this condition in the future. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"516420"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/516420","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32054035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-12-10DOI: 10.1155/2013/807526
Hasan M Al-Dorzi, Hani M Tamim, Abdulaziz S Aldawood, Yaseen M Arabi
{"title":"Venous thromboembolism in critically ill cirrhotic patients: practices of prophylaxis and incidence.","authors":"Hasan M Al-Dorzi, Hani M Tamim, Abdulaziz S Aldawood, Yaseen M Arabi","doi":"10.1155/2013/807526","DOIUrl":"https://doi.org/10.1155/2013/807526","url":null,"abstract":"<p><p>Objectives. We compared venous thromboembolism (VTE) prophylaxis practices and incidence in critically ill cirrhotic versus noncirrhotic patients and evaluated cirrhosis as a VTE risk factor. Methods. A cohort of 798 critically ill patients followed for the development of clinically detected VTE were categorized according to the diagnosis of cirrhosis. VTE prophylaxis practices and incidence were compared. Results. Seventy-five (9.4%) patients had cirrhosis with significantly higher INR (2.2 ± 0.9 versus 1.3 ± 0.6, P < 0.0001), lower platelet counts (115,000 ± 90,000 versus 258,000 ± 155,000/ μ L, P < 0.0001), and higher creatinine compared to noncirrhotic patients. Among cirrhotics, 31 patients received only mechanical prophylaxis, 24 received pharmacologic prophylaxis, and 20 did not have any prophylaxis. Cirrhotic patients were less likely to receive pharmacologic prophylaxis (odds ratio, 0.08; 95% confidence interval (CI), 0.04-0.14). VTE occurred in only two (2.7%) cirrhotic patients compared to 7.6% in noncirrhotic patients (P = 0.11). The incidence rate was 2.2 events per 1000 patient-ICU days for cirrhotic patients and 3.6 events per 1000 patient-ICU days for noncirrhotics (incidence rate ratio, 0.61; 95% CI, 0.15-2.52). On multivariate Cox regression analysis, cirrhosis was not associated with VTE risk (hazard ratio, 0.40; 95% CI, 0.10-1.67). Conclusions. In critically ill cirrhotic patients, VTE incidence did not statistically differ from that in noncirrhotic patients. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"807526"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3872442/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31996605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Postoperative venous thromboembolism prophylaxis by general surgeons in a developing country: a survey.","authors":"Aniketh Venkataram, Shivashankar Santhosh, Deevish Dinakar, Shivananda Siddappa, Rajashekara Babu, Sadashivaiah Shivaswamy","doi":"10.1155/2013/873750","DOIUrl":"https://doi.org/10.1155/2013/873750","url":null,"abstract":"<p><p>Venous thromboembolism (VTE) is the most common preventable cause of hospital death. Several audits in the west have demonstrated that appropriate thromboprophylaxis is not being offered to a large number of surgical patients. Similar audits are lacking in the Indian population, and a perception exists among Indian surgeons that Indian patients are not susceptible to VTE. Hence we undertook a survey to analyze the existing knowledge and practice of VTE prophylaxis amongst general surgeons in India. A questionnaire-based survey was conducted on 100 active general surgeons. We found that 97% of surgeons had encountered VTE in their practice, and 49% had encountered mortality from pulmonary embolism. 64% of surgeons do not routinely score patients preoperatively for their VTE risk, and only 33% reported the presence of an institute-based protocol for the same. There was a wide disparity in the prophylaxis methods used for each risk group, particularly in the moderate-risk group. These findings suggest the need for adoption of institute-based protocols for prophylaxis and the evolution of Indian guidelines for VTE prophylaxis. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"873750"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/873750","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31868151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-12-16DOI: 10.1155/2013/563217
Pål O Borgen, Ola E Dahl, Olav Reikeras
{"title":"Biomarkers of Coagulation and Fibrinolysis during Cemented Total Hip Arthroplasty with Pre- versus Postoperative Start of Thromboprophylaxis.","authors":"Pål O Borgen, Ola E Dahl, Olav Reikeras","doi":"10.1155/2013/563217","DOIUrl":"https://doi.org/10.1155/2013/563217","url":null,"abstract":"<p><p>Venous thrombosis is common in elective hip surgery, and prophylaxis is recommended. Clinical trials suggest that the drug dose and timing of initiating prophylaxis significantly influence antithrombotic effectiveness and safety. We studied the time course and gradient of plasma coagulation and fibrinolysis during total hip arthroplasty (THA) in twenty patients that were randomly assigned to have the first dose of 5000 IU dalteparin subcutaneously (sc) injected 12 hours before or 6 hours after surgery. Baseline characteristics were similar in both groups. Specific biomarkers on coagulation (prothrombin fragment 1+2 (F1+2)) and fibrinolytic activity (plasmin/ α 2-antiplasmin complex (PAP) and D-dimer) were collected at six events during hospitalization and analysed. There were no significant group differences in the biomarkers at any time point. The highest concentrations were measured 6 hours after surgery and before the first postoperative injection. A marked decrease followed at the first postoperative day, and then a second increase in plasma concentrations was observed 6 days after surgery. This study showed that activation of coagulation and fibrinolysis by the operative trauma was the same when the first dose of dalteparin was injected 12 hours before or 6 hours after surgery. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"563217"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3876918/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32054036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-11-17DOI: 10.1155/2013/601450
Stine Funder Jespersen, Louisa M Christensen, Anders Christensen, Hanne Christensen
{"title":"Use of oral anticoagulation therapy in atrial fibrillation after stroke: results from a nationwide registry.","authors":"Stine Funder Jespersen, Louisa M Christensen, Anders Christensen, Hanne Christensen","doi":"10.1155/2013/601450","DOIUrl":"10.1155/2013/601450","url":null,"abstract":"<p><p>Background. The knowledge is still sparse about patient related factors, influencing oral anticoagulation therapy (OAC) rates, in stroke patients with atrial fibrillation (AF). Aims. To assess the use of OAC in ischemic stroke patients diagnosed with AF and to identify patient related factors influencing the initiation of OAC. Methods. In the nationwide Danish Stroke Registry we identified 55,551 patients admitted with acute ischemic stroke from 2003 to 2011. Frequency analysis was used to assess the use of OAC in patients with AF, and logistic regression was used to determine independent predictors of OAC. Results. 17.1% (n = 9,482) of ischemic stroke patients had AF. OAC prescription rates were increasing, and in 2011 46.6% were prescribed OAC, 42.5% had a contraindication, and 3.7% were not prescribed OAC without a stated contraindication. Younger age, less severe stroke, and male gender were positive predictors of OAC, while excessive alcohol consumption, smoking, and institutionalization were negative predictors of OAC (P values < 0.05). Conclusions. Advanced age, severe stroke, female gender, institutionalization, smoking, and excessive alcohol consumption were associated with lower OAC rates. Contraindications were generally present in patients not in therapy, and the assumed underuse of OAC may be overestimated. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"601450"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3855960/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31965096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-04-10DOI: 10.1155/2013/973710
Kelly M Rudd, Elizabeth Lisa M Phillips
{"title":"New oral anticoagulants in the treatment of pulmonary embolism: efficacy, bleeding risk, and monitoring.","authors":"Kelly M Rudd, Elizabeth Lisa M Phillips","doi":"10.1155/2013/973710","DOIUrl":"10.1155/2013/973710","url":null,"abstract":"<p><p>Anticoagulation therapy is mandatory in patients with pulmonary embolism to prevent significant morbidity and mortality. The mainstay of therapy has been vitamin-K antagonist therapy bridged with parenteral anticoagulants. The recent approval of new oral anticoagulants (NOACs: apixaban, dabigatran, and rivaroxaban) has generated significant interest in their role in managing venous thromboembolism, especially pulmonary embolism due to their improved pharmacokinetic and pharmacodynamic profiles, predictable anticoagulant response, and lack of required efficacy monitoring. This paper addresses the available literature, on-going clinical trials, highlights critical points, and discusses potential advantages and disadvantages of the new oral anticoagulants in patients with pulmonary embolism.</p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"973710"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/973710","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31444801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-12-22DOI: 10.1155/2013/640723
Antonio Gómez-Outes, Ana Isabel Terleira-Fernández, Gonzalo Calvo-Rojas, M Luisa Suárez-Gea, Emilio Vargas-Castrillón
{"title":"Dabigatran, Rivaroxaban, or Apixaban versus Warfarin in Patients with Nonvalvular Atrial Fibrillation: A Systematic Review and Meta-Analysis of Subgroups.","authors":"Antonio Gómez-Outes, Ana Isabel Terleira-Fernández, Gonzalo Calvo-Rojas, M Luisa Suárez-Gea, Emilio Vargas-Castrillón","doi":"10.1155/2013/640723","DOIUrl":"https://doi.org/10.1155/2013/640723","url":null,"abstract":"<p><p>Background. New oral anticoagulants (NOAC; rivaroxaban, dabigatran, apixaban) have become available as an alternative to warfarin anticoagulation in non-valvular atrial fibrillation (NVAF). Methods. MEDLINE and CENTRAL, regulatory agencies websites, clinical trials registers and conference proceedings were searched to identify randomised controlled trials of NOAC versus warfarin in NVAF. Two investigators reviewed all studies and extracted data on patient and study characteristics along with cardiovascular outcomes. Relative risks (RR) and 95% confidence intervals (CI) were estimated using a random effect meta-analysis. Results. Three clinical trials in 50,578 patients were included. The risk of non-hemorrhagic stroke and systemic embolic events (SEE) was similar with the NOAC and warfarin (RR = 0.93; 95% CI = 0.83-1.04), while the risk of intracranial bleeding (ICB) with the NOAC was lower than with warfarin (RR = 0.46; 95% CI = 0.33-0.65). We found differences in the effect size on all strokes and SEE depending on geographic region as well as on non-hemorrhagic stroke, SEE, bleeding and mortality depending on time in therapeutic range. Conclusion. The NOAC seem no more effective than warfarin for prevention of nonhemorrhagic stroke and SEE in the overall NVAF population, but are generally associated with a lower risk of ICB than warfarin. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"640723"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/640723","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32054037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-02-21DOI: 10.1155/2013/183616
Nay Min Tun, Thein Hlaing Oo
{"title":"Prevention and treatment of venous thromboembolism with new oral anticoagulants: a practical update for clinicians.","authors":"Nay Min Tun, Thein Hlaing Oo","doi":"10.1155/2013/183616","DOIUrl":"https://doi.org/10.1155/2013/183616","url":null,"abstract":"<p><p>Traditional anticoagulants, such as warfarin and enoxaparin, have several limitations, including parenteral administration, need for laboratory monitoring, and ongoing dose adjustment, which may limit optimal patient care. Newer oral anticoagulants, such as direct thrombin inhibitors (e.g., dabigatran etexilate) and direct factor Xa inhibitors (e.g., rivaroxaban, apixaban, and edoxaban), have been developed to overcome these drawbacks, and thereby improve patient care. Several of these agents have been approved for use in the prevention and treatment of venous and/or systemic thromboembolism. The objective of this paper is to provide an overview of the available clinical trial data for these new oral anticoagulants in the prevention and treatment of venous thromboembolism and a practical update for clinicians.</p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":" ","pages":"183616"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/183616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40228967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-10-31DOI: 10.1155/2013/948765
Andreas Eisenreich
{"title":"Regulation of vascular function on posttranscriptional level.","authors":"Andreas Eisenreich","doi":"10.1155/2013/948765","DOIUrl":"https://doi.org/10.1155/2013/948765","url":null,"abstract":"<p><p>Posttranscriptional control of gene expression is crucial for regulating plurality of proteins and functional plasticity of the proteome under (patho)physiologic conditions. Alternative splicing as well as micro (mi)RNA-mediated mechanisms play an important role for the regulation of protein expression on posttranscriptional level. Both alternative splicing and miRNAs were shown to influence cardiovascular functions, such as endothelial thrombogenicity and the vascular tone, by regulating the expression of several vascular proteins and their isoforms, such as Tissue Factor (TF) or the endothelial nitric oxide synthase (eNOS). This review will summarize and discuss the latest findings on the (patho)physiologic role of alternative splicing processes as well as of miRNAs on modulation of vascular functions, such as coagulation, thrombosis, and regulation of the vascular tone. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"948765"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/948765","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31913735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ThrombosisPub Date : 2013-01-01Epub Date: 2013-11-19DOI: 10.1155/2013/247913
Murali Janakiram, Matthew Sullivan, Marina Shcherba, Shuang Guo, Henny H Billett
{"title":"A systematic review of the utility of residual vein obstruction studies in primary and secondary venous thrombosis.","authors":"Murali Janakiram, Matthew Sullivan, Marina Shcherba, Shuang Guo, Henny H Billett","doi":"10.1155/2013/247913","DOIUrl":"10.1155/2013/247913","url":null,"abstract":"<p><p>Background. Residual vein obstruction (RVO), the persistence of venous thrombosis with time and often after anticoagulation, may indicate a systemic prothrombotic condition. Prior studies have shown varying efficacy in using RVO as a risk factor for future venous thromboembolic (VTE) recurrence. Methods. To assess whether positive RVO imaging predicts recurrent VTE events, we performed a meta-analysis on studies in which patients with documented VTEs, anticoagulated for a minimum of 4 weeks, had repeat sonography to assess RVO and were subsequently followed for recurrent events. Results. Thirteen studies met inclusion criteria: 3531 patient VTE events with 3474 evaluable results were analyzed. The presence of RVO was associated with recurrence in all VTE (OR 1.93; 95% CI: 1.29, 2.89) and secondary VTE (OR 2.78; 95% CI: 1.41, 5.5) but not for primary VTE (OR 1.35; 95% CI: 0.87, 2.08). When cancer patients were eliminated from the secondary VTE group, there was no longer a significant association of RVO with VTE recurrence (OR 1.73; 95% CI: 0.81, 3.67) while in the subset of cancer patients, presence of RVO was associated with an increase in VTE recurrence risk (OR 5.14; 95% CI: 1.59, 16.65, P < 0.006). Conclusions. We conclude that the presence of RVO is associated with recurrence in secondary VTE but not in primary VTE and that association may be driven by the subset with cancer. </p>","PeriodicalId":75222,"journal":{"name":"Thrombosis","volume":"2013 ","pages":"247913"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3853333/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31965153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}