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Warfarin Use, Stroke, and Bleeding Risk among Pre-Existing Atrial Fibrillation US Veterans Transitioning to Dialysis
In this study, we validated risk scores for stroke and bleeding in this population and assessed risk of stroke and bleeding among warfarin users compared to nonusers.Methods: We utilized a cohort of 28,620 pre-dialysis US veterans transitioning to hemodialysis between October 2007 and March 2015. Incident rates for the risks of stroke and bleeding were ascertained based upon CHA2DS2-VASc or HAS-BLED scores, respectively. A propensity score-based competing risk analysis was used to assess risk of stroke and bleeding.Findings: The mean age of our cohort was 77 ± 9 years, and the median CHA2DS2-VASc and HAS-BLED scores were ...
Source: Nephron - February 4, 2022 Category: Urology & Nephrology Source Type: research

Preventing stroke and systemic embolism in renal patients with atrial fibrillation: focus on anticoagulation.
Abstract Chronic kidney disease and atrial fibrillation (AF) commonly coexist, and data suggest that renal patients have AF rates in excess of double that encountered in the general population. These patients are at increased risk of stroke, regardless of the presence or absence of AF. Furthermore, a lower GFR causes increased thromboembolic risk in patients with AF - independent of other risk factors. The dilemma facing clinicians treating this cohort of patients is that renal insufficiency confers both a thromboembolic and a bleeding risk. Renal disease also commonly coexists with other risk factors for stroke a...
Source: Contributions to Nephrology - May 26, 2013 Category: Urology & Nephrology Authors: Ahmad Y, Lip GY Tags: Contrib Nephrol Source Type: research

Atrial Fibrillation and Warfarin Use in Haemodialysis Patients: An Individualized Holistic Approach is Important in Stroke Prevention
Abstract Incidence and prevalence of Atrial Fibrillation (AF) is higher in hemodialysis (HD) population than general population. AF is associated with higher morbidity and mortality than sinus rhythm in this population. The purpose of this review is to summarize all available evidence regarding use of warfarin in HD patients with AF for stroke prevention. The enormous heterogeneity of available studies does not allow pooling of the data in the form of meta‐analysis or systematic review. Current evidence regarding use of warfarin for AF in terms of risk benefit ratio in this population is limited and conflicting. Randomiz...
Source: Nephrology - March 25, 2013 Category: Urology & Nephrology Authors: Zaw Thet, Eswari Vilayur Tags: Review Article Source Type: research

Warfarin use, mortality, bleeding and stroke in haemodialysis patients with atrial fibrillation
Conclusions In our population of HD patients with AF, the mortality is very high. OAT is not associated with increased mortality, while antiplatelet drugs are. OAT seems, on the contrary, associated with a better survival; however, it does not decrease the incidence of ischaemic stroke, whereas it increases the incidence of bleeding. Bleeding risk is lower in subjects in whom the INR is kept within the therapeutic range.
Source: Nephrology Dialysis Transplantation - February 23, 2015 Category: Urology & Nephrology Authors: Genovesi, S., Rossi, E., Gallieni, M., Stella, A., Badiali, F., Conte, F., Pasquali, S., Bertoli, S., Ondei, P., Bonforte, G., Pozzi, C., Rebora, P., Valsecchi, M. G., Santoro, A. Tags: Intra- and Extracorporeal Treatments of Kidney Failure Source Type: research

Recent Advances in Stroke Prevention in Patients with Atrial Fibrillation and End-Stage Renal Disease
Background: Chronic kidney disease (CKD) is associated with a high prevalence of atrial fibrillation (AF), but in this population the risk/benefit ratio of anticoagulant therapy with vitamin K antagonists (VKA) for thromboprophylaxis is uncertain.Summary: In end-stage renal disease (ESRD) patients undergoing hemodialysis, VKA seem less effective in stroke prevention than in the general population, with an increased risk of major bleeding. Recently, novel oral anticoagulant agents (NOACs) have proven to be effective for stroke prevention in AF and have demonstrated an improved safety profile compared to VKA. Limited data fr...
Source: Cardiorenal Medicine - April 26, 2017 Category: Urology & Nephrology Source Type: research

Warfarin use, mortality, bleeding and stroke in haemodialysis patients with atrial fibrillation
This interesting study of hemodialysis patients on oral anticoagulation for atrial fibrillation showed that although their overall mortality was high – it was not associated with warfarin.  In fact, warfarin was associated with better survival and antiplatelet agents increased overall mortality. . : The intersection of risk and benefit: is warfarin anticoagulation suitable for atrial fibrillation in patients on hemodialysis? Effects of Antiplatelet Therapy on Mortality and Cardiovascular and Bleeding Outcomes in Persons With Chronic Kidney Disease: A Systematic Review and Meta-analysis Stroke and Bleeding in Atrial Fib...
Source: Nephrology Now - March 18, 2015 Category: Urology & Nephrology Authors: Nephrology Now editors Tags: Clinical Nephrology Hemodialysis Source Type: research

Cardiologists' and nephrologists' management of atrial fibrillation in hemodialysis patients 
.
CONCLUSION: Cardiologists were more likely to prescribe anticoagulant therapy for AF in the HD population compared to nephrologists, regardless of patient stroke or bleeding risk.
. PMID: 31496513 [PubMed - as supplied by publisher]
Source: Clinical Nephrology - September 8, 2019 Category: Urology & Nephrology Authors: Marcus L, Mackeigan L, Leblanc K, Orlov D, Mitsakakis N, Austin Z, Jassal SV, Battistella M Tags: Clin Nephrol Source Type: research

Outcomes After Warfarin Initiation in a Cohort of Hemodialysis Patients With Newly Diagnosed Atrial Fibrillation
Conclusions In hemodialysis patients with incident AF, warfarin use was marginally associated with reduced risk of ischemic stroke, and there was a signal toward reduced mortality in as-treated analyses. These results support clinical equipoise regarding the use of warfarin in hemodialysis patients and underscore the need for randomized trials to fill this evidence gap.
Source: American Journal of Kidney Diseases - July 9, 2015 Category: Urology & Nephrology Source Type: research

Direct oral anticoagulants in chronic kidney disease: an update
Purpose of review Direct oral anticoagulants (DOACs) are variably eliminated by the kidneys rendering their use potentially problematic in patients with chronic kidney disease (CKD) or necessitating appropriate dose adjustment. Recent findings Both observational and limited randomized trial data for DOACs compared with no treatment or with warfarin for patients with atrial fibrillation on maintenance dialysis were recently published. In a randomized trial in patients on hemodialysis, there was no significant difference in vascular calcification between patients who received rivaroxaban with or without vitamin K2 or vi...
Source: Current Opinion in Nephrology and Hypertension - August 1, 2020 Category: Urology & Nephrology Tags: PHARMACOLOGY AND THERAPEUTICS: Edited by Sankar D. Navaneethan Source Type: research

Use and safety of heparin-free maintenance hemodialysis in the USA
Conclusions Patient markers of increased risk of bleeding and facility region associated with heparin-free HD use. Despite the potential benefits of avoiding heparin use, heparin-free HD was not significantly associated with decreased hazards of death, bleeding or thrombosis, suggesting that it may be no safer than HD with heparin.
Source: Nephrology Dialysis Transplantation - June 18, 2013 Category: Urology & Nephrology Authors: Shen, J. I., Mitani, A. A., Chang, T. I., Winkelmayer, W. C. Tags: Intra- and Extracorporeal Treatment of Kidney Failure Source Type: research

The effects of vitamin K supplementation and vitamin K antagonists on progression of vascular calcification: ongoing randomized controlled trials
Conclusion Vitamin K deficiency may be a modifiable cardiovascular risk factor in the haemodialysis population. Conversely, vitamin K antagonists may aggravate VC burden in haemodialysis patients. Several ongoing trials may provide an answer to these questions in the near future.
Source: CKJ: Clinical Kidney Journal - March 15, 2016 Category: Urology & Nephrology Authors: Caluwe, R., Pyfferoen, L., De Boeck, K., De Vriese, A. S. Tags: CKD-MBD Source Type: research

A case of cerebral infarction during a hemodialysis procedure successfully treated with recombinant tissue plasminogen activator
We report a case of a 75-year-old HD patient who presented with sudden aphasia during HD treatment. She was brought to the hospital for treatment for infarction. Following thrombolytic therapy, we achieved re-opening without complications. To our knowledge, no report has been published describing the patients who had a stroke during a maintenance HD session and were treated with r-tPA successfully. Although the number of HD patients treated with r-tPA is small and requires further investigation, thrombolytic therapy can be an alternative option. After weighing the risks and benefits and assessing each patient carefully, th...
Source: CEN Case Reports - June 12, 2018 Category: Urology & Nephrology Source Type: research

Extracorporeal Therapy for Dabigatran Removal in the Treatment of Acute Bleeding: A Single Center Experience.
CONCLUSIONS: Extracorporeal therapy lowered dabigatran concentrations, suggesting that it removed the drug and may effectively accelerate total clearance, especially in patients with impaired kidney function. The use of prolonged intermittent hemodialysis or intermittent hemodialysis followed by continuous renal replacement therapy is recommended for the management of life-threatening bleeding in patients receiving dabigatran. The advantage of extracorporeal therapy should be weighed against the risk of bleeding with catheter insertion. PMID: 23704302 [PubMed - as supplied by publisher]
Source: Clinical Journal of the American Society of Nephrology : CJASN - May 23, 2013 Category: Urology & Nephrology Authors: Singh T, Maw TT, Henry BL, Pastor-Soler NM, Unruh ML, Hallows KR, Nolin TD Tags: Clin J Am Soc Nephrol Source Type: research

Vitamin k antagonists: beyond bleeding.
Abstract Warfarin is the most widely used oral anticoagulant in clinical use today. Indications range from prosthetic valve replacement to recurrent thromboembolic events due to antiphospholipid syndrome. In hemodialysis (HD) patients, warfarin use is even more frequent than in the nonrenal population due to increased cardiovascular comorbidities. The use of warfarin in dialysis patients with atrial fibrillation requires particular caution because side effects may outweigh the assumed benefit of reduced stroke rates. Besides increased bleeding risk, coumarins exert side effects which are not in the focus of clinic...
Source: Seminars in Dialysis - January 1, 2014 Category: Urology & Nephrology Authors: Krüger T, Floege J Tags: Semin Dial Source Type: research

Evaluating time in therapeutic range for hemodialysis patients taking warfarin.
In conclusion, this HD unit is not meeting the TTR goal established in the literature and patients are often subtherapeutic. Further studies to investigate ways to improve TTR are warranted. Ultimately, a prospective study evaluating the safety and efficacy of warfarin in HD patients is needed. PMID: 25500296 [PubMed - as supplied by publisher]
Source: Clinical Nephrology - December 15, 2014 Category: Urology & Nephrology Authors: Quinn LM, Richardson R, Cameron KJ, Battistella M Tags: Clin Nephrol Source Type: research

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