Abstract：
:External validation is a prerequisite in order for a prediction model to be introduced into clinical practice. Nonetheless, methodologically intact external validation studies are a scarce finding. Utilization of big datasets can help overcome several causes of methodological failure. However, transparent reporting is needed to standardize the methods, assess the risk of bias and synthesize multiple validation studies in order to infer model generalizability. We describe the methodological challenges faced when using multiple big datasets to perform the first retrospective external validation study of the Prospective Comparison of Methods for thromboembolic risk assessment with clinical Perceptions and AwareneSS in real life patients-Cancer Associated Thrombosis (COMPASS-CAT) Risk Assessment Model for predicting venous thromboembolism in patients with cancer. The challenges included choosing the starting point, defining time sensitive variables that serve both as risk factors and outcome variables and using non-research oriented databases to form validated definitions from administrative codes. We also present the structured plan we used so as to overcome those obstacles and reduce bias with the target of producing an external validation study that successfully complies with prediction model reporting guidelines.
journal_name
J Thromb Thrombolysisjournal_title
Journal of thrombosis and thrombolysisauthors
Nikolakopoulos I,Nourabadi S,Eldredge JB,Anand L,Zhang M,Qiu M,Rosenberg D,Spyropoulos ACdoi
10.1007/s11239-020-02191-8subject
Has Abstractpub_date
2021-01-01 00:00:00pages
12-16issue
1eissn
0929-5305issn
1573-742Xpii
10.1007/s11239-020-02191-8journal_volume
51pub_type
杂志文章abstract：:While antithrombotic therapy of acute myocardial infarction is clearly beneficial, substantial controversy exists regarding the optimal regimen. In particular, while aspirin alone has proven highly effective in reducing rates of reinfarction, stroke, and death following acute coronary occlusion, heparin has not clearl...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/BF01062568
更新日期：1995-01-01 00:00:00
abstract：:Since the reports by Weismann and Tobin in 1958 and Roberts et al. in 1964 called attention to paradoxical thrombosis in patients treated with heparin, the thrombotic aspect of the heparin-induced thrombocytopenia syndrome (HIT) has been emphasized. Yet to this day, the mechanism of thrombosis associated with HIT (HIT...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章,评审
doi：10.1023/a:1027372901367
更新日期：2000-11-01 00:00:00
abstract：:Non vitamin K oral anticoagulants (NOACs) do not require regular monitoring but information about their pharmacodynamic effect may be importantin situations like trauma, stroke oremergent surgery. Currently, no standardized point-of-care test is available to evaluate the anticoagulant effects of NOACs. We evaluated th...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-017-1477-1
更新日期：2017-05-01 00:00:00
abstract：OBJECTIVE:To report our experience with use of thrombolysis with streptokinase during cardiopulmonary resuscitation of patients with cardiac arrest due to myocardial infarction. DESIGN:A case series. METHODS:Thrombolytic therapy (streptokinase) was administered during cardiopulmonary resuscitation of 4 patients with ...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-005-3547-z
更新日期：2005-12-01 00:00:00
abstract：:Patients with non-valvular atrial fibrillation who are under chronic oral anticoagulant therapy (OAC) treatment frequently require interruption of OAC treatment. By examining the presence of left atrial/left atrial appendage (LA/LAA) thrombus or dense spontaneous echo contrast (SEC) with transesophageal echocardiograp...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-020-02104-9
更新日期：2020-08-01 00:00:00
abstract：BACKGROUND:Radiographic contrast agents inhibit fibrinolysis, although by poorly defined pathways. The purpose of this study was to define specific mechanisms by which contrast agents inhibit clot lysis. METHODS AND RESULTS:Diatrizoate (high osmolar ionic agent), ioxaglate (low osmolar ionic), and ioversol (nonionic) ...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1023/a:1015283210156
更新日期：2001-12-01 00:00:00
abstract：:Polycythemia vera (PV), essential thrombocythemia (ET) and idiopathic myelofibrosis (IMF), collectively known as Philadelphia-negative (Ph-negative) chronic myeloproliferative neoplasms (MPNs), MPNs represent the most common causes of splanchnic vein thrombosis (SVT), including Budd-Chiari syndrome (BCS) and portal ve...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 临床试验,杂志文章
doi：10.1007/s11239-012-0738-2
更新日期：2012-10-01 00:00:00
abstract：:To investigate the relationship between circulating microRNA 223 (miR-223) levels and clopidogrel responsiveness in patients with coronary heart disease. A total of 62 consecutive patients with troponin-negative non-ST elevation acute coronary syndrome (NSTE-ACS) scheduled for elective percutaneous coronary interventi...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 临床试验,杂志文章
doi：10.1007/s11239-013-1022-9
更新日期：2014-07-01 00:00:00
abstract：:In this feasibility study, a novel catheter prototype for laser thrombolysis under the guidance of optical coherence tomography (OCT) was designed and evaluated in a preclinical model. Human arteries and veins were integrated into a physiological flow model and occluded with thrombi made from the Chandler Loop. There ...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-016-1470-0
更新日期：2017-04-01 00:00:00
abstract：:Data comparing the patient characteristics, management and outcomes for dabigatran versus warfarin major bleeding in the practice setting are limited. We performed a retrospective single health system study of atrial fibrillation patients with dabigatran or warfarin major bleeding from October 2010 through September 2...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-015-1213-7
更新日期：2015-10-01 00:00:00
abstract：BACKGROUND:Pharmacoinvasive therapy for the treatment of ST elevation myocardial infarction (STEMI) is a strategy that combines early restoration of coronary flow via pharmacologically induced thrombolysis with subsequent, prompt percutaneous coronary intervention (PCI). Prior studies suggesting a heightened bleeding r...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-005-0344-7
更新日期：2004-12-01 00:00:00
abstract：:Infective endocarditis (IE) remains a severe illness with high mortality rate, despite advances in antibiotic therapy and cardiac surgery. If infectious bacteria and platelets are two key players of human IE vegetation developmental process, their interactions and respective roles in fully developed late-stage IE vege...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-020-02232-2
更新日期：2020-08-04 00:00:00
abstract：:The duration of oral anticoagulant therapy for venous thromboembolism (VTE) depends on the risk of recurrence if treatment is stopped and the risk of bleeding if treatment is continued. If the risk of recurrence is low (e.g., thrombosis provoked by a major reversible risk factor such as surgery), 3 months of treatment...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章,评审
doi：10.1023/a:1012790511790
更新日期：2001-09-01 00:00:00
abstract：:Pulmonary embolism (PE) is a leading cause of cardiovascular mortality. We intended to evaluate the awareness and management status of PE among Chinese physicians and provide the basis for establishing Chinese clinical guidelines on PE. We designed a nationwide survey to collect data on physicians' awareness of diagno...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-018-1788-x
更新日期：2019-04-01 00:00:00
abstract：:Warfarin is a widely prescribed anticoagulant used for prophylaxis and treatment of venous and arterial thrombosis. Although warfarin is considered very efficacious, it has substantial risks associated with its use, specifically the risk of hemorrhage. Genetic variants associated with the metabolism of (S)-warfarin by...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章,评审
doi：10.1023/B:THRO.0000011376.12309.af
更新日期：2003-06-01 00:00:00
abstract：:This article focuses on lessons learned from clinical trials of antiplatelet therapies-in particular, that the degree of inhibition of ex vivo platelet aggregation does not necessarily directly translate into clinical efficacy. As an example, the case of the oral platelet glycoprotein IIb/IIIa inhibitors is presented,...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-007-0160-3
更新日期：2008-08-01 00:00:00
abstract：:Anticoagulation treatment is effective in preventing both death and recurrence in patients with venous thromboembolism (VTE), but at the same time confers a substantial risk of bleeding complications. The aim of this study was to examine the rate of and predictors for bleeding complications in VTE patients on warfarin...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-015-1305-4
更新日期：2016-02-01 00:00:00
abstract：:This study investigates the association between the treatment with heparin and mortality in patients admitted with Covid-19. Routinely recorded, clinical data, up to the 24th of April 2020, from the 2075 patients with Covid-19, admitted in 17 hospitals in Spain between the 1st of March and the 20th of April 2020 were ...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章,多中心研究
doi：10.1007/s11239-020-02162-z
更新日期：2020-08-01 00:00:00
abstract：:According to our personal experience and to the study of the literature, 11 cases of venous thrombosis have been described as sporadic reports in patients with severe (homozygous) factor XII (FXII) deficiencies. In every cases but 4, associated risk factors were found to be present (pregnancy, post-partum period, surg...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章,评审
doi：10.1023/B:THRO.0000037670.42776.cd
更新日期：2004-04-01 00:00:00
abstract：:Glycoprotein (GP) IIb/IIIa inhibitors reduce major adverse coronary events in patients with acute coronary syndromes undergoing percutaneous coronary interventions (PCI). Unlike the other GPIIb/IIIa inhibitors, eptifibatide is rarely associated with thrombocytopenia with only a few cases reported in the medical litera...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-007-0166-x
更新日期：2008-04-01 00:00:00
abstract：:Peripherally inserted central catheters (PICCs) for central venous access are frequently used in patients with hematological malignancies. Their use may be complicated by upper extremity deep venous thrombosis (UEDVT). Additionally, hematological patients are frequently thrombocytopenic and the optimal management of U...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-020-02040-8
更新日期：2020-04-01 00:00:00
abstract：:The use of magnesium therapy for acute myocardial infarction remains controversial despite recent clinical trials such as ISIS-4. Magnesium has numerous beneficial effects in the setting of myocardial infarction, including inhibitory effects on platelet aggregation. Clinical trials of magnesium therapy for myocardial ...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/BF01064375
更新日期：1995-01-01 00:00:00
abstract：:The benefits of thrombolytic therapy in the treatment of acute myocardial infarction are incontrovertible. Large-scale studies combining angiographic and clinical end-points have demonstrated a perfusion-mortality relationship, with the highest survival rate among patients with early restoration of TIMI grade 3 corona...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/BF01062706
更新日期：1995-01-01 00:00:00
abstract：:The Tissue Factor/Factor VIIa (TF/FVIIa) complex is an attractive target for pharmacological interruption of thrombin generation and hence blood coagulation, as this complex is the initiation point of the extrinsic pathway of coagulation. TF is a cell membrane-associated protein that interacts with soluble FVIIa to ac...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1023/a:1023228827733
更新日期：2002-10-01 00:00:00
abstract：:We report a case of infective endocarditis (IE) involving the posterior mitral leaflet (PML) with calcific embolization in a patient with hypertrophic obstructive cardiomyopathy (HOCM). Amongst HOCM patients with IE, the anterior mitral leaflet and basal septal myocardium are almost always involved due to the endocard...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-014-1111-4
更新日期：2015-02-01 00:00:00
abstract：:Thromboembolism afflicts millions of patients annually in the United States and is associated with a significant cost burden. Recent advances in oral anticoagulation have provided clinicians with more options for management of these diseases. Accordingly, regulatory, legislative, and policy-making organizations have i...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章,评审
doi：10.1007/s11239-015-1198-2
更新日期：2015-04-01 00:00:00
abstract：:A perceived increased risk of bleeding is one of the most frequent reasons for withholding anticoagulation for stroke prevention in atrial fibrillation (AF). We previously conducted a randomized controlled trial of alert-based computerized decision support to increase prescription of anticoagulation in hospitalized pa...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-020-02296-0
更新日期：2020-09-30 00:00:00
abstract：:Acute myocardial infarction is initiated by plaque disruption of a fatty plaque with a thin fibrous cap which has been infiltrated by macrophages. The macrophages are attracted and stimulated by oxidized lipids to secrete metalloproteinases which dissolve collagen and arterial wall matrix and to synthesize tissue fact...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/BF01060732
更新日期：1995-01-01 00:00:00
abstract：:Pump thrombosis remains a serious complication of implantable ventricular assist device therapy and is associated with increased risk of morbidity and mortality. Optimal management strategies remain controversial and are guided largely by limited literature and expert opinion. Medical management of pump thrombosis, in...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 杂志文章
doi：10.1007/s11239-018-1725-z
更新日期：2018-11-01 00:00:00
abstract：:Patients with mechanical heart valves (MHV) undergoing invasive procedures often receive periprocedural bridging with low-molecular-weight heparin (LMWH). The bridging strategies used in real-life and the predictors for bleeding and thrombosis are not well studied. We retrospectively assessed patients with MHV that un...
journal_title：Journal of thrombosis and thrombolysis
pub_type： 临床试验,杂志文章,多中心研究
doi：10.1007/s11239-015-1216-4
更新日期：2015-11-01 00:00:00
