| 1. |
- Bassand, Jean-Pierre, et al.
(author)
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Relationship between baseline haemoglobin and major bleeding complications in acute coronary syndromes
- 2010
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In: European Heart Journal. - : Oxford University Press (OUP). - 0195-668X .- 1522-9645. ; 31:1, s. 50-58
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Journal article (peer-reviewed)abstract
- AIMS: In patients with acute coronary syndromes (ACS), the negative impact of baseline haemoglobin levels on ischaemic events, particularly death, is well established, but the association with bleeding risk is less well studied. The aim of this study was to assess the impact of baseline haemoglobin levels on major bleeding complications. METHODS AND RESULTS: Pooled analysis of OASIS 5 and 6 data involving 32 170 patients with ACS with and without ST-segment elevation was performed. The association between baseline haemoglobin and major bleeding or ischaemic events was examined using multiple regression model. MAIN OUTCOME MEASURES: were 30-day rates of major bleeding, death, and death/myocardial infarction (MI) analysed according to baseline haemoglobin levels. Baseline haemoglobin level independently predicted the risk of overall, procedure-related, and non-procedure-related major bleedings at 30 days [odds ratio (OR) 0.94, 95% CI 0.90-0.98; OR 0.94, 95% CI 0.90-0.99; and OR 0.89, 95% CI 0.83-0.95, respectively, per 1 g/dL haemoglobin increment above 10 g/dL]. In addition, a curvilinear relationship between baseline haemoglobin levels and death at 30 days was observed with a 6% decrease in the risk for every 1 g/dL haemoglobin increment above 10 g/dL up to 15.9 g/dL (OR 0.94, 95% CI 0.90-0.98) and a 19% increase above this value (OR 1.19, 95% CI, 0.98-1.43). A similar relationship for the composite outcome of death/MI was observed. CONCLUSION: A low baseline haemoglobin level is an independent predictor of the risk of major bleeding in ACS as well as of the risk of death and death and MI. Among other predictors of bleeding risk, baseline haemoglobin should be taken into account in patients presenting with ACS. Clinical trial registration: ClinicalTrials.gov number, NCT00139815. http://clinicaltrials.gov/ct2/show/NCT00139815?term=NCT00139815&rank=1.
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| 2. |
- Dans, Antonio L, et al.
(author)
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Concomitant Use of Antiplatelet Therapy with Dabigatran or Warfarin in the Randomized Evaluation of Long-Term Anticoagulation Therapy (RE-LY®) Trial
- 2013
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In: Circulation. - 0009-7322 .- 1524-4539. ; 127:5, s. 634-640
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Journal article (peer-reviewed)abstract
- BACKGROUND:RE-LY showed that dabigatran etexilate 150 mg bid (DE150) was superior, and 110 mg bid (DE110) non-inferior to warfarin in preventing stroke and systemic embolism (SSE) in patients with atrial fibrillation (AF). In this subgroup analysis, we assess the efficacy and safety of dabigatran in patients who did and didn't receive concomitant antiplatelets METHODS AND RESULTS: All comparisons used a cox proportional hazards model with adjustments made for risk factors for bleeding. A time dependent analysis was performed when comparing patients with concomitant antiplatelets to those without. 6952 of 18,113 patients (38.4%) received concomitant ASA or clopidogrel at some time during the study. DE110 was non-inferior to warfarin in reducing SSE, whether patients received antiplatelets (HR=0.93; 95%CI: 0.70-1.25) or not (HR=0.87; 95%CI: 0.66-1.15; interaction p=0.738). There were less major bleeds than warfarin in both subgroups (HR=0.82; 95%CI: 0.67-1.00 for patients who used antiplatelets; HR=0.79; 95% CI: 0.64-0.96 for patients who didn't; interaction p=0.794). DE 150 reduced the primary outcome of SSE compared to warfarin. This effect seemed attenuated among patients who used antiplatelets (HR=0.80, 95%CI: 0.59-1.08) compared to those who didn't (HR=0.52, 95%CI: 0.38-0.72; p for interaction=0.058). Major bleeding was similar to warfarin regardless of antiplatelet use (HR=0.93, 95%CI: 0.76-1.12 for patients who used antiplatelets; HR=0.94, 95%CI: 0.78-1.15 for patients who didn't; p for interaction=0.875). In the time dependent analysis, concomitant use of a single antiplatelet seemed to increase the risk of major bleeding (HR=1.60; 95% CI: 1.42, 1.82). Dual antiplatelet seemed to increased this even more (HR=2.31; 95% CI: 1.79, 2.98). The absolute risks were lowest on DE110 compared to DE150 or warfarin.CONCLUSIONS:Concomitant antiplatelet drugs appeared to increase the risk for major bleeding in RE-LY without affecting the advantages of dabigatran over warfarin. Choosing between DE110 and DE150 requires a careful assessment of characteristics that influence the balance between benefit and harm.
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| 4. |
- Eikelboom, John W., et al.
(author)
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Risk of Bleeding With 2 Doses of Dabigatran Compared With Warfarin in Older and Younger Patients With Atrial Fibrillation An Analysis of the Randomized Evaluation of Long-Term Anticoagulant Therapy (RE-LY) Trial
- 2011
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In: Circulation. - 0009-7322 .- 1524-4539. ; 123:21, s. 2363-2372
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Journal article (peer-reviewed)abstract
- Background-Dabigatran 150 and 110 mg twice a day and warfarin are effective for stroke prevention in atrial fibrillation. The purpose of this study was to compare their risks of bleeding in the Randomized Evaluation of Long-Term Anticoagulant Therapy (RE-LY) trial. Methods and Results-The RE-LY trial randomized 18 113 patients to receive dabigatran 110 or 150 mg twice a day or warfarin dose adjusted to an international normalized ratio of 2.0 to 3.0 for a median follow-up of 2.0 years. Compared with warfarin, dabigatran 110 mg twice a day was associated with a lower risk of major bleeding (2.87% versus 3.57%; P=0.002), whereas dabigatran 150 mg twice a day was associated with a similar risk of major bleeding (3.31% versus 3.57%; P=0.32). There was a significant treatment-by-age interaction, such that dabigatran 110 mg twice a day compared with warfarin was associated with a lower risk of major bleeding in patients aged = 75 years (4.43% versus 4.37%; P=0.89; P for interaction = 75 years (5.10% versus 4.37%; P=0.07; P for interaction = 75 years, intracranial bleeding risk is lower but extracranial bleeding risk is similar or higher with both doses of dabigatran compared with warfarin.
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| 5. |
- Healey, Jeff S., et al.
(author)
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Periprocedural Bleeding and Thromboembolic Events With Dabigatran Compared With Warfarin Results From the Randomized Evaluation of Long-Term Anticoagulation Therapy (RE-LY) Randomized Trial
- 2012
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In: Circulation. - 0009-7322 .- 1524-4539. ; 126:3, s. 343-348
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Journal article (peer-reviewed)abstract
- Background-Dabigatran reduces ischemic stroke in comparison with warfarin; however, given the lack of antidote, there is concern that it might increase bleeding when surgery or invasive procedures are required.Methods and Results-The current analysis was undertaken to compare the periprocedural bleeding risk of patients in the Randomized Evaluation of Long-Term Anticoagulation Therapy (RE-LY) trial treated with dabigatran and warfarin. Bleeding rates were evaluated from 7 days before until 30 days after invasive procedures, considering only the first procedure for each patient. A total of 4591 patients underwent at least 1 invasive procedure: 24.7% of patients received dabigatran 110 mg, 25.4% received dabigatran 150 mg, and 25.9% received warfarin, P=0.34. Procedures included: pacemaker/defibrillator insertion (10.3%), dental procedures (10.0%), diagnostic procedures (10.0%), cataract removal (9.3%), colonoscopy (8.6%), and joint replacement (6.2%). Among patients assigned to either dabigatran dose, the last dose of study drug was given 49 (35-85) hours before the procedure on comparison with 114 (87-144) hours in patients receiving warfarin, P<0.001. There was no significant difference in the rates of periprocedural major bleeding between patients receiving dabigatran 110 mg (3.8%) or dabigatran 150 mg (5.1%) or warfarin (4.6%); dabigatran 110 mg versus warfarin: relative risk, 0.83; 95% CI, 0.59 to 1.17; P=0.28; dabigatran 150 mg versus warfarin: relative risk, 1.09; 95% CI, 0.80 to 1.49; P=0.58. Among patients having urgent surgery, major bleeding occurred in 17.8% with dabigatran 110 mg, 17.7% with dabigatran 150 mg, and 21.6% with warfarin: dabigatran 110 mg; relative risk, 0.82; 95% CI, 0.48 to 1.41; P=0.47; dabigatran 150 mg: relative risk, 0.82; 95% CI, 0.50 to 1.35; P=0.44.Conclusions-Dabigatran and warfarin were associated with similar rates of periprocedural bleeding, including patients having urgent surgery. Dabigatran facilitated a shorter interruption of oral anticoagulation.
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| 6. |
- Hohnloser, Stefan H., et al.
(author)
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Myocardial Ischemic Events in Patients With Atrial Fibrillation Treated With Dabigatran or Warfarin in the RE-LY (Randomized Evaluation of Long-Term Anticoagulation Therapy) Trial
- 2012
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In: Circulation. - 0009-7322 .- 1524-4539. ; 125:5, s. 669-676
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Journal article (peer-reviewed)abstract
- Background: There is a modest risk of myocardial infarction (MI) and myocardial ischemic events in patients with atrial fibrillation.Methods and Results: Data from the RE-LY study (Randomized Evaluation of Long-Term Anticoagulation Therapy) were used to report rates of MI, unstable angina, cardiac arrest, and cardiac death and the prespecified net clinical benefit and treatment effects of dabigatran versus warfarin. MI occurred at annual rates of 0.82% and 0.81% with dabigatran 110 or 150 mg BID compared with 0.64% with warfarin (hazard ratio [HR] 1.29, 95% confidence interval [CI] 0.96-1.75, P=0.09 for dabigatran 110 mg; HR 1.27, 95% CI 0.94-1.71, P=0.12 for dabigatran 150 mg). Annual rates of a composite of MI, unstable angina, cardiac arrest, and cardiac death were 3.16% per year with dabigatran 110 mg, 3.33% per year with dabigatran 150 mg, and 3.41% per year with warfarin (HR versus warfarin 0.93, 95% CI 0.80-1.06, P=0.28 for dabigatran 110 mg and HR 0.98, 95% CI 0.85-1.12, P=0.77 for dabigatran 150 mg). Events prespecified as "net clinical benefit" (all strokes, systemic embolism, MI, pulmonary embolism, major bleeding, and all-cause death) occurred at a rate of 7.34% per year with dabigatran 110 mg, 7.11% per year with dabigatran 150 mg, and 7.91% per year with warfarin (HR 0.92, 95% CI 0.84 -1.01, P=0.09 for dabigatran 110 mg and HR 0.90, 95% CI 0.82-0.99, P=0.02 for dabigatran 150 mg). The relative effects of dabigatran versus warfarin on myocardial ischemic events were consistent in patients with or without a baseline history of MI or coronary artery disease.Conclusions: There was a nonsignificant increase in MI with dabigatran compared with warfarin, but other myocardial ischemic events were not increased. Treatment effects of dabigatran were consistent in patients at higher and lower risk of myocardial ischemic events.
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