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Iwafuchi Y, Ito Y, Imai N, Oyama Y, Narita I. Dabigatran-related Nephropathy Complicated by Tubulointerstitial Nephritis in a Patient with a Normal Renal Function and Undiagnosed IgA Nephropathy. Intern Med 2024; 63:1615-1621. [PMID: 37866913 PMCID: PMC11189709 DOI: 10.2169/internalmedicine.2628-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/07/2023] [Indexed: 10/24/2023] Open
Abstract
A 69-year-old woman was referred to our hospital because of an acute kidney injury with macroscopic hematuria. She had been taking dabigatran for atrial flutter for six years. Based on the typical histological findings of her kidney biopsy and her history of dabigatran use with prolonged activated partial thromboplastin time, she was diagnosed with dabigatran-related nephropathy complicated by tubulointerstitial nephritis with IgA nephropathy. After prednisolone therapy, the renal function improved. Direct-acting oral anticoagulants, including dabigatran, may cause anticoagulant-related nephropathy similar to warfarin, even in patients with a normal renal function. Tubulointerstitial nephritis may coexist with dabigatran-related nephropathy, and prednisolone therapy should be considered in such cases. IgA nephropathy has been reported as a background disease, and caution should be exercised when encountering it.
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Affiliation(s)
- Yoichi Iwafuchi
- Department of Internal Medicine, Koseiren Sanjo General Hospital, Japan
| | - Yumi Ito
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Japan
| | - Naofumi Imai
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Japan
| | - Yuko Oyama
- Department of Internal Medicine, Koseiren Sanjo General Hospital, Japan
| | - Ichiei Narita
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Japan
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Vestergaard AEF, Jensen SK, Heide-Jørgensen U, Adelborg K, Birn H, Carrero JJ, Christiansen CF. Oral anticoagulant treatment and risk of kidney disease-a nationwide, population-based cohort study. Clin Kidney J 2024; 17:sfad252. [PMID: 38186872 PMCID: PMC10768770 DOI: 10.1093/ckj/sfad252] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Indexed: 01/09/2024] Open
Abstract
Background Direct oral anticoagulants (DOACs) are recommended as first-line treatment of atrial fibrillation. Whether DOAC use is associated with lower risks of kidney complications compared with vitamin K antagonists (VKAs) remains unclear. We examined this association in a nationwide, population-based cohort study. Methods We conducted a cohort study including patients initiating oral anticoagulant treatment within 3 months after an atrial fibrillation diagnosis in Denmark during 2012-18. Using routinely collected creatinine measurements from laboratory databases, we followed patients in an intention-to-treat approach for acute kidney injury (AKI) and chronic kidney disease (CKD) progression. We used propensity-score weighting to balance baseline confounders, computed weighted risks and weighted hazard ratios (HRs) with 95% confidence intervals (CIs) comparing DOACs with VKAs. We performed several subgroup analyses and a per-protocol analysis. Results We included 32 781 persons with atrial fibrillation initiating oral anticoagulation (77% initiating DOACs). The median age was 75 years, 25% had a baseline estimated glomerular filtration rate <60 mL/min/1.73 m2, and median follow-up was 2.3 (interquartile range 1.1-3.9) years. The weighted 1-year risks of AKI were 13.6% in DOAC users and 15.0% in VKA users (HR 0.86, 95% CI 0.82; 0.91). The weighted 5-year risks of CKD progression were 13.9% in DOAC users and 15.4% in VKA users (HR 0.85, 95% CI 0.79; 0.92). Results were similar across subgroups and in the per-protocol analysis. Conclusions Initiation of DOACs was associated with a decreased risk of AKI and CKD progression compared with VKAs. Despite the potential limitations of observational studies, our findings support the need for increased clinical awareness to prevent kidney complications among patients who initiate oral anticoagulants.
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Affiliation(s)
- Ane Emilie Friis Vestergaard
- Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Aarhus, Denmark
| | - Simon Kok Jensen
- Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Aarhus, Denmark
| | - Uffe Heide-Jørgensen
- Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Aarhus, Denmark
| | - Kasper Adelborg
- Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Biochemistry, Gødstrup Regional Hospital, Gødstrup, Denmark
| | - Henrik Birn
- Departments of Biomedicine and Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Renal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Juan-Jesus Carrero
- Department of Medical Epidemiology and Biostatisctics, Karolinska Institutet, Stockholm, Sweden
| | - Christian Fynbo Christiansen
- Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Aarhus, Denmark
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Qiu Z, Pang X, Xiang Q, Cui Y. The Crosstalk between Nephropathy and Coagulation Disorder: Pathogenesis, Treatment, and Dilemmas. J Am Soc Nephrol 2023; 34:1793-1811. [PMID: 37487015 PMCID: PMC10631605 DOI: 10.1681/asn.0000000000000199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 07/10/2023] [Indexed: 07/26/2023] Open
Abstract
ABSTRACT The interaction between the kidney and the coagulation system greatly affects each other because of the abundant vessel distribution and blood perfusion in the kidney. Clinically, the risks of complicated thrombosis and bleeding have become important concerns in the treatment of nephropathies, especially nephrotic syndrome, CKD, ESKD, and patients with nephropathy undergoing RRTs. Adverse effects of anticoagulant or procoagulant therapies in patients with nephropathy, especially anticoagulation-related nephropathy, heparin-induced thrombocytopenia, and bleeding, seriously worsen the prognosis of patients, which have become challenges for clinicians. Over the decades, the interaction between the kidney and the coagulation system has been widely studied. However, the effects of the kidney on the coagulation system have not been systematically investigated. Although some coagulation-related proteins and signaling pathways have been shown to improve coagulation abnormalities while avoiding additional kidney damage in certain kidney diseases, their potential as anticoagulation targets in nephropathy requires further investigation. Here, we review the progression of research on the crosstalk between the coagulation system and kidney diseases and systematically analyze the significance and shortcomings of previous studies to provide new sight into future research. In addition, we highlight the status of clinical treatment for coagulation disorder and nephropathy caused by each other, indicating guidance for the formulation of therapeutic strategies or drug development.
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Affiliation(s)
- Zhiwei Qiu
- Department of Pharmacy, Peking University First Hospital, Beijing, China
- Institute of Clinical Pharmacology, Peking University First Hospital, Beijing, China
| | - Xiaocong Pang
- Department of Pharmacy, Peking University First Hospital, Beijing, China
- Institute of Clinical Pharmacology, Peking University First Hospital, Beijing, China
| | - Qian Xiang
- Department of Pharmacy, Peking University First Hospital, Beijing, China
- Institute of Clinical Pharmacology, Peking University First Hospital, Beijing, China
| | - Yimin Cui
- Department of Pharmacy, Peking University First Hospital, Beijing, China
- Institute of Clinical Pharmacology, Peking University First Hospital, Beijing, China
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Trevisan M, Hjemdahl P, Clase CM, de Jong Y, Evans M, Bellocco R, Fu EL, Carrero JJ. Cardiorenal Outcomes Among Patients With Atrial Fibrillation Treated With Oral Anticoagulants. Am J Kidney Dis 2023; 81:307-317.e1. [PMID: 36208798 DOI: 10.1053/j.ajkd.2022.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 07/31/2022] [Indexed: 11/06/2022]
Abstract
RATIONALE & OBJECTIVE Direct oral anticoagulants (DOACs) have progressively replaced vitamin K antagonists (VKAs) for stroke prevention in patients with nonvalvular atrial fibrillation (AF). DOACs cause fewer bleeding complications, but their other advantages, particularly related to kidney outcomes, remain inconclusive. We studied the risks of chronic kidney disease (CKD) progression and acute kidney injury (AKI) after DOAC and VKA administration for nonvalvular AF. STUDY DESIGN Retrospective cohort study. SETTING & PARTICIPANTS Cohort study of Swedish patients enrolled in the Stockholm Creatinine Measurements (SCREAM) project with a diagnosis of nonvalvular AF during 2011-2018. EXPOSURE Initiation of DOAC or VKA treatment. OUTCOME Primary outcomes were CKD progression (composite of >30% estimated glomerular filtration rate [eGFR] decline and kidney failure) and AKI (by diagnosis or KDIGO-defined transient creatinine elevations). Secondary outcomes were death, major bleeding, and the composite of stroke and systemic embolism. ANALYTICAL APPROACH Propensity score weighted Cox regression was used to balance 50 baseline confounders. Sensitivity analyses included falsification end points, subgroups, and estimation of per-protocol effects. RESULTS We included 32,699 patients (56% initiated DOAC) who were observed for a median of 3.8 years. Their median age was 75 years, 45% were women, and 27% had an eGFR <60mL/min/1.73m2. The adjusted HRs for DOAC versus VKA were 0.87 (95% CI, 0.78-0.98) for the risk of CKD progression and 0.88 (95% CI, 0.80-0.97) for AKI. HRs were 0.77 (95% CI, 0.67-0.89) for major bleeding, 0.93 (95% CI, 0.78-1.11) for the composite of stroke and systemic embolism, and 1.04 (95% CI, 0.95-1.14) for death. The results were similar across subgroups of age, sex, and baseline eGFR when restricting to patients at high risk for thromboembolic events and when censoring follow up at treatment discontinuation or change in type of anticoagulation. LIMITATIONS Missing information on time in therapeutic range and treatment dosages. CONCLUSIONS Among patients with nonvalvular AF treated in routine clinical practice compared with VKA use, DOAC use was associated with a lower risk of CKD progression, AKI, and major bleeding but a similar risk of the composite of stroke, systemic embolism, or death.
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Affiliation(s)
- Marco Trevisan
- Department of Medical Epidemiology and Biostatistics, Campus Solna, Karolinska Institutet, Stockholm, Sweden
| | - Paul Hjemdahl
- Clinical Epidemiology Unit/Clinical Pharmacology, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Catherine M Clase
- Department of Medicine and Health Research Methods, Evidence and Impact, McMaster University, Ontario, Canada
| | - Ype de Jong
- Division of Pharmacoepidemiology, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Marie Evans
- Department of Clinical Science Intervention and Technology, Hospital Huddinge, Karolinska University, Huddinge, Sweden
| | - Rino Bellocco
- Department of Medical Epidemiology and Biostatistics, Campus Solna, Karolinska Institutet, Stockholm, Sweden; Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
| | - Edouard L Fu
- Department of Medical Epidemiology and Biostatistics, Campus Solna, Karolinska Institutet, Stockholm, Sweden; Division of Pharmacoepidemiology, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Juan Jesus Carrero
- Department of Medical Epidemiology and Biostatistics, Campus Solna, Karolinska Institutet, Stockholm, Sweden; Division of Nephrology, Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, Stockholm, Sweden.
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5
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Chen S, Liao D, Yang M, Wang S. Anticoagulant-related nephropathy induced by direct-acting oral anticoagulants: Clinical characteristics, treatments and outcomes. Thromb Res 2023; 222:20-23. [PMID: 36563521 DOI: 10.1016/j.thromres.2022.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/29/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
INTRODUCTION There is a scarcity of data on anticoagulation-related nephropathy (ARN) caused by direct-acting oral anticoagulants (DOACs) in recent years. MATERIALS AND METHODS We collected literatures on DOACs-induced ARN to October 1, 2022, without language restrictions for retrospective analysis. RESULTS Twenty events were included with a median onset time of 28 days among which fourteen were caused by dabigatran. Patients accompanied by chronic kidney disease (85 %) seemed more easily to have an ARN. Clinical symptoms associated with ARN were mostly presented as hematuria and acute decline of renal function (100 %), then abnormal coagulation function (75 %) but only one with an INR over 3. Renal biopsies were performed in 14 patients, with thirteen showing occlusive intratubular red blood cell casts and ten showing acute tubular injury of varying intensity or even tubular necrosis. Extensive changes in interstitial compartment like hemorrhage, fibrosis or inflammation were also presented in eight biopsies. IgA nephropathy as a latent or undiagnosed disease was demonstrated in eight biopsies. Treatments of ARN were mainly supportive with all patients discontinuing DOACs and 35 % initiating dialysis for acute deterioration of renal function. Steroids were used in 9 patients with a severe ARN verified by biopsy. 60 % of patients did not recover baseline renal function and some even deteriorated. CONCLUSIONS In conclusion, DOACs-induced ARN is a rare but serious adverse reaction. A prompt diagnosis of ARN and supportive treatments are necessary for patients receiving DOACs concurrent with an acute renal injury.
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Affiliation(s)
- Shanshan Chen
- Department of Pharmacy, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, China
| | - Dehua Liao
- Department of Pharmacy, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, China
| | - Minghua Yang
- Postdoctoral Research Station of Clinical Medicine and Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China.
| | - Shengfeng Wang
- Department of Pharmacy, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, China; Postdoctoral Research Station of Clinical Medicine and Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China; Department of Pharmacy, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China.
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Trujillo H, Sandino J, Cavero T, Caravaca-Fontán F, Gutiérrez E, Sevillano ÁM, Shabaka A, Fernández-Juárez G, Doyágüez PR, Muñoz RG, García LC, Cabello V, Muñoz-Terol JM, Santiago AG, Toldos O, Moreno JA, Praga M. IgA nephropathy is the most common underlying disease in patients with anticoagulant-related nephropathy. Kidney Int Rep 2022; 7:831-840. [PMID: 35497792 PMCID: PMC9039479 DOI: 10.1016/j.ekir.2022.01.1048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 01/10/2022] [Accepted: 01/10/2022] [Indexed: 11/12/2022] Open
Abstract
Introduction Anticoagulant-related nephropathy (ARN) is a relatively novel recognized entity characterized by hematuria-associated acute kidney injury (AKI) in the context of overanticoagulation. Preexisting or underlying kidney disease seems to be a predisposing factor; however, few studies have described histologic findings in patients with ARN. We aimed to evaluate underlying kidney pathology in patients on oral anticoagulation who presented an episode of AKI with hematuria in whom a kidney biopsy was performed. Methods Retrospective observational multicenter case study in patients treated with oral anticoagulants who developed macroscopic or intense hematuria followed by AKI. Only patients with available kidney biopsy specimens were included. Histologic findings and clinical data throughout follow-up were analyzed. Results A total of 26 patients were included with a median age of 75 years (62–80) and a follow-up period of 10.1 months. Of the patients, 80% were male, and most cases (92%) were on anticoagulation with vitamin K antagonists (VKAs). At admission, median serum creatinine (SCr) level was 4.2 mg/dl (2.8–8.2), median international normalized ratio (INR) 2.4 (1.5–3.4), and 11 patients (42%) required acute dialysis during hospitalization. Kidney biopsy results revealed that all patients except 1 had an underlying nephropathy: IgA nephropathy (IgAN) in 19, probable IgAN in 1, diabetic nephropathy in 3, nephrosclerosis in 1, and idiopathic nodular glomerulosclerosis in 1. At 12 weeks after discharge, only 6 subjects (24%) attained complete kidney recovery whereas 7 (28%) remained on chronic dialysis. Conclusion IgAN was the most common underlying kidney disease in our biopsy-proven series of ARN, in which a significant percentage of patients did not achieve kidney function recovery.
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7
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Harel Z, McArthur E, Jeyakumar N, Sood MM, Garg AX, Silver SA, Dorian P, Blum D, Beaubien-Souligny W, Yan AT, Badve SV, Smyth B, Jun M, Jandoc R, Kitchlu A, Wald R. The Risk of Acute Kidney Injury with Oral Anticoagulants in Elderly Adults with Atrial Fibrillation. Clin J Am Soc Nephrol 2021; 16:1470-1479. [PMID: 34407990 PMCID: PMC8499008 DOI: 10.2215/cjn.05920421] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/09/2021] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND OBJECTIVES Anticoagulation with either a vitamin K antagonist or a direct oral anticoagulant may be associated with AKI. Our objective was to assess the risk of AKI among elderly individuals with atrial fibrillation newly prescribed a direct oral anticoagulant (dabigatran, rivaroxaban, or apixaban) versus warfarin. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Our population-based cohort study included 20,683 outpatients in Ontario, Canada, ≥66 years with atrial fibrillation who were prescribed warfarin, dabigatran, rivaroxaban, or apixaban between 2009 and 2017. Inverse probability of treatment weighting on the basis of derived propensity scores for the treatment with each direct oral anticoagulant was used to balance baseline characteristics among patients receiving each of the three direct oral anticoagulants compared with warfarin. Cox proportional hazards regression was performed in the weighted population to compare the association between the prescribed anticoagulant and the outcomes of interest. The exposure was an outpatient prescription of warfarin or one of the direct oral anticoagulants. The primary outcome was a hospital encounter with AKI, defined using Kidney Disease Improving Global Outcomes thresholds. Prespecified subgroup analyses were conducted by eGFR category and by the percentage of international normalized ratio measurements in range, a validated marker of anticoagulation control. RESULTS Each direct oral anticoagulant was associated with a significantly lower risk of AKI compared with warfarin (weighted hazard ratio, 0.65; 95% confidence interval, 0.53 to 0.80 for dabigatran; weighted hazard ratio, 0.85; 95% confidence interval, 0.73 to 0.98 for rivaroxaban; and weighted hazard ratio, 0.81; 95% confidence interval, 0.72 to 0.93 for apixaban). In the subgroup analysis, the lower risk of AKI associated with each direct oral anticoagulant was consistent across each eGFR strata. The risk of AKI was significantly lower among users of each of the direct oral anticoagulants compared with warfarin users who had a percentage of international normalized ratio measurements ≤56%. CONCLUSIONS Direct oral anticoagulants were associated with a lower risk of AKI compared with warfarin.
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Affiliation(s)
- Ziv Harel
- Division of Nephrology, St. Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada,KDT, ICES, London, Ontario, Canada
| | | | | | - Manish M. Sood
- KDT, ICES, London, Ontario, Canada,Division of Nephrology, University of Ottawa, Ottawa, Ontario, Canada
| | - Amit X. Garg
- KDT, ICES, London, Ontario, Canada,Division of Nephrology, Western University, London, Ontario, Canada
| | - Samuel A. Silver
- KDT, ICES, London, Ontario, Canada,Division of Nephrology, Kingston Health Sciences Centre, Queens University, Kingston, Ontario, Canada
| | - Paul Dorian
- Division of Cardiology, St. Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Daniel Blum
- Division of Nephrology, McGill University, Montreal, Quebec, Canada
| | | | - Andrew T. Yan
- Division of Cardiology, St. Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Sunil V. Badve
- Division of Nephrology, The George Institute for Global Health, University of New South Wales, Sydney, Australia,Division of Nephrology, St George Hospital, Sydney, Australia
| | - Brendan Smyth
- Division of Nephrology, The George Institute for Global Health, University of New South Wales, Sydney, Australia,Division of Nephrology, St George Hospital, Sydney, Australia
| | - Min Jun
- Division of Nephrology, The George Institute for Global Health, University of New South Wales, Sydney, Australia
| | | | | | - Ron Wald
- Division of Nephrology, St. Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada,KDT, ICES, London, Ontario, Canada
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Gomez-Fernández P, Martín Santana A, Arjona Barrionuevo JDD. Oral anticoagulation in chronic kidney disease with atrial fibrillation. Nefrologia 2021; 41:137-153. [PMID: 36165375 DOI: 10.1016/j.nefroe.2021.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 08/11/2020] [Indexed: 06/16/2023] Open
Abstract
Chronic kidney disease (CKD) and atrial fibrillation (AF) frequently coexist, amplifying the risk of cardiovascular events and mortality. In patients with CKD stage 3 and non-valvular AF, direct oral anticoagulants (DOACs) have shown, compared to vitamin K antagonists (VKA), equal or greater efficacy in the prevention of stroke and systemic embolism, and greater safety. There are no randomizedtrials of the efficacy and safety of DOACs and VKA in advanced CKD. On the other hand, observational studies suggest that DOACs, compared to warfarin, are associated with a lower risk of acute kidney damage and generation/progression of CKD. This paper reviews the epidemiological and pathophysiological aspects of the CKD and AF association, the evidence of the efficacy and safety of warfarin and ACODs in various stages of CKD with AF as well as the comparison between warfarin and ACODs in efficacy and anticoagulant safety, and in its renal effects.
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Affiliation(s)
- Pablo Gomez-Fernández
- Unidad de Factores de Riesgo Vascular, Servicio de Nefrología, Hospital Universitario de Jerez, Jerez de la Frontera, Cádiz, Spain.
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9
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Acute Kidney Injury due to Anticoagulant-Related Nephropathy : A Suggestion for Therapy. Case Rep Nephrol 2020; 2020:8952670. [PMID: 32566333 PMCID: PMC7298278 DOI: 10.1155/2020/8952670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 03/16/2020] [Indexed: 02/02/2023] Open
Abstract
The relationship between kidneys and anticoagulation is complex, especially after introduction of the direct oral anticoagulants (DOAC). It is recently growing evidence of an anticoagulant-related nephropathy (ARN), a form of acute kidney injury caused by excessive anticoagulation. The pathogenesis of kidney damage in this setting is multifactorial, and nowadays, there is no established treatment. We describe a case of ARN, admitted to our Nephrology Unit with a strong suspicion of ANCA-associated vasculitis due to gross haematuria and haemoptysis; the patient was being given dabigatran. Renal biopsy excluded ANCA-associated vasculitis and diagnosed a red blood cell cast nephropathy superimposed to an underlying IgA nephropathy. Several mechanisms are possibly responsible for kidney injury in ARN: tubular obstruction, cytotoxicity of heme-containing molecules and free iron, and activation of proinflammatory/profibrotic cytokines. Therefore, the patient was given a multilevel strategy of treatment. A combination of reversal of coagulopathy (i.e., withdrawal of dabigatran and infusion of its specific antidote) along with administration of fluids, sodium bicarbonate, steroids, and mannitol resulted in conservative management of AKI and fast recovery of renal function. This observation could suggest a prospective study aiming to find the best therapy of ARN.
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10
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Yadav P, Yadav S, Pathak S. Warfarin: A double-edged sword. J Family Med Prim Care 2019; 8:3045-3047. [PMID: 31681692 PMCID: PMC6820438 DOI: 10.4103/jfmpc.jfmpc_671_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 08/23/2019] [Accepted: 09/06/2019] [Indexed: 11/12/2022] Open
Abstract
Warfarin is the commonest anticoagulant used in today's practice; it has a very narrow therapeutics window. Under and overdosing results in various life-threatening complications. Warfarin-related nephropathy (WRN) is a rare cause of acute kidney injury (AKI) in patients on long-term anticoagulation, as a result of supratherapeutic anticoagulation. Warfarin causes AKI by inducing glomerular hemorrhage with subsequent tubular obstruction by red blood cell (RBC) casts. WRN has been associated with irreversible kidney injury and increased risk of mortality. Despite a better understanding of pathophysiology and histopathology of WRN, its preventive measures and clinical outcome are not well known. We report here the case of a 62-year-old male, who was on a long-term warfarin therapy due to chronic atrial fibrillation with a history of old ischemic stroke and dilated cardiomyopathy. He was presented with AKI and his renal biopsy was suggestive of WRN. He was managed by withholding warfarin for a few days until the therapeutic range of international normalized ratio was achieved and steroids and N-acetylcysteine (NAC) recovered. WRN is a diagnosis of exclusion; other causes of AKI must be ruled out. Renal biopsy is the gold standard for diagnosis. Patients on chronic anticoagulant therapy should be monitored periodically for the therapeutic range of anticoagulants, deterioration of renal function, and hematuria.
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Affiliation(s)
- Prabhakar Yadav
- Consultant Nephrologist, Tata Main Hospital, Jamshedpur, Jharkhand, India
| | - Sonal Yadav
- Registrar, Tata Main Hospital, Jamshedpur, Jharkhand, India
| | - Saurabh Pathak
- Sr. Registrar, Tata Main Hospital, Jamshedpur, Jharkhand, India
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