Abstract P596: How Common Are Microembolic Signals After Cerebrovascular Events and Are They Related to Recurrent Admissions?

Stroke ◽  
2021 ◽  
Vol 52 (Suppl_1) ◽  
Author(s):  
Behnam SABAYAN ◽  
Simin Mahinrad ◽  
Sanaz Sedaghat ◽  
Eric M Liotta ◽  
Farzaneh A Sorond
Keyword(s):  
Cox Regression ◽  
Hospital Readmissions ◽  
Smoking History ◽  
Vein Thrombosis ◽  
Complication Risk ◽  
Cerebrovascular Events ◽  
History Of ◽  
Artery Disease ◽  
Ischemic Attack ◽  
Deep Vein

Introduction: Microembolic signals (MES) identified by transcranial Doppler (TCD) reflect an ongoing embolic phenomenon with implications for the recurrence of cerebrovascular events and complications. In this study, we investigated the prevalence of MES detected after stroke or transient ischemic attack (TIA) and studied their relationship with future re-admissions. Method: This clinical cohort study is comprised of 961 consecutive patients (mean age 65 years, 59% male) admitted to Northwestern Memorial Hospital with the diagnosis of acute stroke (n: 872) or TIA (n: 89) and underwent TCD evaluation. TCD is performed within the first 48 hours of admission as a routine component of stroke etiology evaluation at our institution. After discharge, patients were followed for an average of 18 months for any hospital readmissions. Cox regression models were used to estimate risk of re-admissions in relation to MES. Results: MES were detected in 99 (10%, 95% CI; 8-12%) patients. During the follow up period, 356 patients had emergency room re-admissions. Compared to patients without MES, those with MES were younger ( p =0.007) and had longer index hospital stay ( p =0.008). Patients with MES, as compared to patients without MES, had 1.56-fold (hazard ratio 95% CI=1.15, 2.13; p =0.005) higher risk of readmission. This association was independent of age, sex, race, smoking, history of hyperlipidemia, diabetes, atrial fibrillation, history of pulmonary emboli, deep vein thrombosis, hypertension, coronary artery disease and heart failure. Conclusion: We show that MES are present in one tenth of patients admitted with stroke or TIA, and they are associated with higher risk of re-admission. These data highlight the importance of embolic signals in stroke complication risk stratification and suggest the need for prospective clinical trials targeting MES in secondary stroke risk and complication prevention.

A murine model of deep vein thrombosis Characterization and validation in transgenic mice

2005 ◽  
Vol 94 (09) ◽  
pp. 498-503 ◽  
Author(s):  
Linda Szema ◽  
Chao-Ying Chen ◽  
Jeffrey P. Schwab ◽  
Gregory Schmeling ◽  
Brian C. Cooley
Keyword(s):  
Deep Vein Thrombosis ◽  
Murine Model ◽  
Femoral Vein ◽  
Previous History ◽  
Bed Rest ◽  
Major Surgery ◽  
Vein Thrombosis ◽  
Transgenic Lines ◽  
History Of ◽  
Deep Vein

SummaryDeep vein thrombosis (DVT) occurs with high prevalence in association with a number of risk factors, including major surgery, trauma, obesity, bed rest (>5 days), cancer, a previous history of DVT, and several predisposing prothrombotic mutations. A novel murine model of DVT was developed for applications to preclinical studies of transgenically constructed prothrombotic lines and evaluation of new antithrombotic therapies. A transient direct-current electrical injury was induced in the common femoral vein of adult C57Bl/6 mice. A non-occlusive thrombus grew, peaking in size at 30 min, and regressing by 60 min, as revealed by histomorphometric volume reconstruction of the clot. Pre-heparinization greatly reduced clot formation at 10, 30, and 60 min (p<0.01 versus non-heparinized). Homozygous FactorV Leiden mice (analogous to the clinical FactorV Leiden prothrombotic mutation) on a C57Bl/6 background had clot volumes more than twice those of wild-types at 30 min (0.121±0.018 mm3 vs. 0.052±0.008 mm3, respectively; p<0.01). Scanning electron microscopy revealed a clot surface dominated by fibrin strands, in contrast to arterial thrombi which showed a platelet-dominated structure. This new model of DVT presents a quantifiable approach for evaluating thrombosis-related murine transgenic lines and for comparatively evaluating new pharmacologic approaches for prevention of DVT.

scholarly journals History of COVID-19 infection is not associated with increased d-dimer levels and risk of deep-vein thrombosis in total joint arthroplasty

2021 ◽  
Author(s):  
Anna Jungwirth-Weinberger ◽  
Ilya Bendich ◽  
Carola Hanreich ◽  
Alejandro Gonzalez Della Valle ◽  
Jason L. Blevins ◽  
...  
Keyword(s):  
Deep Vein Thrombosis ◽  
Total Joint Arthroplasty ◽  
Joint Arthroplasty ◽  
Vein Thrombosis ◽  
History Of ◽  
Deep Vein ◽  
D Dimer

scholarly journals Incidence of inpatient venous thromboembolism in treated patients with rheumatoid arthritis and the association with switching biologic or targeted synthetic disease-modifying antirheumatic drugs (DMARDs) in the real-world setting

RMD Open ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. e001013 ◽  
Author(s):  
Huifang Liang ◽  
Raghava Danwada ◽  
Dianlin Guo ◽  
Jeffrey R Curtis ◽  
Ryan D Kilpatrick ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Cox Regression ◽  
Incidence Rates ◽  
Disease Modifying Antirheumatic Drugs ◽  
Vein Thrombosis ◽  
Real World Setting ◽  
Increased Risk ◽  
Safety Studies ◽  
Unbiased Estimates ◽  
Deep Vein

ObjectivesTo assess incidence rates (IRs) of VTE in patients with rheumatoid arthritis (RA) on different DMARDs and DMARD switchers.MethodsAdults with RA on a DMARD between 2007 and 2017 were studied in a US claims database. Conventional synthetic DMARD (csDMARD) users, first biologic/targeted synthetic DMARD (b/tsDMARD) users and b/tsDMARD switchers (from a b/tsDMARD to another b/tsDMARD) were followed for inpatient VTE (pulmonary embolism (PE)/deep vein thrombosis (DVT)). Crude and adjusted IR and 95% CIs of VTE were estimated. HRs for VTE were estimated via Cox regression. VTE risk was also evaluated by number of switches between b/tsDMARDs and in patients without a VTE history.ResultsThe age and sex standardised IR (95% CI) of VTE (per 100 person-years) was 0.86 (0.70 to 1.03), 0.60 (0.52 to 0.68) and 0.58 (0.51 to 0.65) for b/tsDMARD switchers, first b/tsDMARD users and csDMARD users, respectively. After adjustment, b/tsDMARD switchers had an increased risk of VTE, compared with csDMARD users, HRadj (95% CI) being 1.36 (1.16 to 1.58), 1.36 (1.13 to 1.63) and 1.47 (1.18 to 1.83) for VTE, DVT and PE, respectively. Compared with first b/tsDMARD users, the HRadj (95% CI) for VTE was 1.35 (1.15 to 1.60) for first b/tsDMARD switchers and 1.48 (1.19 to 1.85) for second b/tsDMARD switchers.ConclusionsIn RA, b/tsDMARD switchers have a higher VTE risk compared with csDMARD users and first b/tsDMARD users. Switching b/tsDMARDs may be a proxy for higher disease severity or poorly controlled RA and an important confounder to consider in obtaining unbiased estimates of VTE risk in observational RA safety studies.

Combined Venography And Arthrography In Patients With Joint Pains And A Swollen Calf

1981 ◽  
Author(s):  
J J F Belch ◽  
N McMillan ◽  
G D O Lowe ◽  
C D Forbes
Keyword(s):  
Deep Vein Thrombosis ◽  
Clinical Diagnosis ◽  
Joint Pain ◽  
Correct Diagnosis ◽  
Clinical Suspicion ◽  
Baker’S Cyst ◽  
Vein Thrombosis ◽  
Baker's Cyst ◽  
History Of ◽  
Deep Vein

Ruptured Baker’s cyst is a well recognised cause of confusion in the diagnosis of deep vein thrombosis (D.V.T.) in patients with arthralgia. Many workers have stressed the need for a high index of clinical suspicion combined with either venography or arthrography, yet in no study has simultaneous arthrography and venography been performed. Ten patients with joint pains admitted because of a swollen calf underwent bilateral ascending venography and unilateral arthrography within 24 hours of admission. Results were compared with the initial clinical diagnosis. On only one out of 10 occasions was the original clinical diagnosis correct. One patient had a D.V.T. alone, 5 patients had a Baker’s cyst and 3 patients had both D.V.T. and Baker’s cyst. One patient had no evidence of either. We conclude that any patient with a history of joint pain who develops a swollen calf should have both a venogram and an arthrogram performed in order to establish the correct diagnosis.

scholarly journals Symptomatic Deep Vein Thrombosis Following Elective Knee Arthroscopy Over the Age of 40

2019 ◽  
Vol 25 ◽  
pp. 107602961985216 ◽  
Author(s):  
Mert Özcan ◽  
Murat Erem ◽  
Fatma Nesrin Turan
Keyword(s):  
Risk Factors ◽  
Deep Vein Thrombosis ◽  
Medical History ◽  
Symptomatic Deep Vein Thrombosis ◽  
Vein Thrombosis ◽  
Contraceptive Usage ◽  
Venous Thromboembolic Events ◽  
History Of ◽  
Deep Vein ◽  
Previous Medical History

Thromboprophylaxis following arthroscopic knee surgery (AKS) is not clear in the literature. The purpose of this study was to present the incidence of symptomatic deep vein thrombosis (DVT) following elective AKS over the age of 40. The secondary purpose was to investigate risk factors associated with venous thromboembolic events (VTEs). Surgical database and outpatient clinic follow-up charts of the patients who underwent AKS for any reason were included in the study. Odds for risk factors such as previous medical history of thrombosis, any family history for clotting disorders, diabetes mellitus (DM), oral contraceptive usage, body mass index, history of malignancy, and smoking were evaluated. The incidence of DVT following AKS significantly increased in the patients older than 40 years who had a previous medical history of VTE, DM, and smoking. A variety of guidelines exist for VTE prophylaxis; however, one should focus on risk factors related to the patient’s medical history and current medical conditions. In this study, smoking, DM, and previous history of DVT increased DVT risk significantly, and thromboprophylaxis should be kept in mind for these patients.

P1467Long-term prognostic value of simultaneous assessment of atherosclerosis and ischemia in patients with suspected angina: implications for routine use of carotid ultrasound during stress echocardiograp

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
S Ahmadvazir ◽  
J Pradhan ◽  
R S Khattar ◽  
R Senior
Keyword(s):  
Stable Angina ◽  
Carotid Plaque ◽  
Cox Regression ◽  
Plaque Burden ◽  
Carotid Ultrasound ◽  
Cardiac Events ◽  
Cox Regression Analysis ◽  
History Of ◽  
Artery Disease

Abstract Background The long-term clinical impact of carotid plaque burden (CPB) in patients with new onset suspected stable angina beyond stress echocardiography (SE) with no history of coronary artery disease (CAD) is not known. Methods Consecutive patients referred for SE, underwent simultaneous carotid ultrasonography to assess CPB. Patients were prospectively followed up for major adverse events (MAE). Results Of the 592 patients, 573 (age 59±11, 45% male) had follow-up data. During a mean of 7±1.2 years, 85 patients had first MAE (all-cause mortality and acute myocardial infarction: 67 (hard events) and 18 unplanned revascularisation). On multivariate Cox regression analysis, pre-test probability of CAD, peak wall thickness scoring index and CPB predicted MAE (p<0.0001 for all); however, only CPB retained significance for both hard events and hard cardiac events (p=0.008 and 0.001, respectively). MAE and hard events were least in patients with normal SE and absent carotid plaque (annualised event rate: 1.1% and 1.01%respectively) with significant increase in normal SE with plaque disease (2.4% and 2.05%, p=0.004 and 0.01 respectively). Presence of plaque did not impact on these outcomes in abnormal SE. Conclusions In patients with suspected stable angina, carotid atherosclerosis and myocardial ischemia in combination provided synergistic MAE information long term but atherosclerosis predicted hard events particularly in patients with normal SE but not in ischemic patients. This implies routine use of simultaneous carotid ultrasound following a normal SE for optimum prognostication

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