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Oral Anticoagulants in Very Elderly Nonvalvular Atrial Fibrillation Patients With High Bleeding Risks: ANAFIE Registry. JACC. ASIA 2022; 2:720-733. [PMID: 36444326 PMCID: PMC9700004 DOI: 10.1016/j.jacasi.2022.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 07/14/2022] [Accepted: 07/28/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Data on the effectiveness and safety of oral anticoagulant (OAC) agents in very elderly nonvalvular atrial fibrillation patients with high bleeding risk are lacking. OBJECTIVES This study examined 2-year outcomes and effects of OAC agents among these patients using the ANAFIE (All Nippon Atrial Fibrillation in the Elderly) registry (N = 32,275) data. METHODS Patients were classified into high-risk (age: ≥80 years; CHADS2 score: ≥2; and presence of ≥1 bleeding risk factor: creatinine clearance of 15-30 mL/minute, prior bleeding at critical sites, body weight of ≤45 kg, or continuous antiplatelet use) and reference groups. RESULTS In the high-risk (n = 7,104) and reference (n = 25,171) group patients, 89.0% and 93.4%, respectively, used OAC agents. Of these, respectively, 30.1% and 24.2% used warfarin, and 58.9% and 69.1% used direct-acting OAC (DOAC) agents. Compared with the reference group, the high-risk group had higher incidences of stroke/systemic embolism, major bleeding, intracranial hemorrhage, gastrointestinal bleeding, cardiovascular events, and all-cause death. In the high-risk group, DOAC agent use vs nonuse of OAC agents was associated with reduced incidences of stroke/systemic embolism (HR: 0.53; 95% CI: 0.36-0.79) and all-cause death (HR: 0.65; 95% CI: 0.52-0.81) but not with major bleeding (HR: 1.09; 95% CI: 0.63-1.89). DOAC agents were superior to warfarin in effectiveness and safety. For high-risk patients, history of major bleeding, severe liver dysfunction, and falls within 1 year were independent risk factors for major bleeding. CONCLUSIONS High-risk elderly nonvalvular atrial fibrillation patients had higher event incidences. DOAC agents were associated with reduced risk of stroke/systemic embolism and all-cause death vs nonuse of OAC agents or warfarin. (Prospective Observational Study in Late-Stage Elderly Patients With Nonvalvular Atrial Fibrillation [ANAFIE registry]; UMIN000024006).
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Retrospective Comparison of Patients ≥ 80 Years With Atrial Fibrillation Prescribed Either an FDA-Approved Reduced or Full Dose Direct-Acting Oral Anticoagulant. IJC HEART & VASCULATURE 2022; 43:101130. [PMID: 36246771 PMCID: PMC9556913 DOI: 10.1016/j.ijcha.2022.101130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/18/2022] [Accepted: 10/03/2022] [Indexed: 11/21/2022]
Abstract
Direct-acting oral anticoagulants (DOACs) represent the standard for preventing stroke and systemic embolization (SSE) in patients with atrial fibrillation (AF). There is limited information for patients ≥ 80 years. We report a retrospective analysis of AF patients ≥ 80 years prescribed either a US Food and Drug Administration (FDA)-approved reduced (n = 514) or full dose (n = 199) DOAC (Dabigatran, Rivaroxaban, or Apixaban) between January 1st, 2011 (first DOAC commercially available) and May 31st, 2017. The following multivariable differences in baseline characteristics were identified: patients prescribed a reduced dose DOAC were older (p < 0.001), had worse renal function (p = 0.001), were more often prescribed aspirin (p = 0.004) or aspirin and clopidogrel (p < 0.001), and more often had new-onset AF (p = 0.001). SSE and central nervous system (CNS) bleed rates were low and not different (1.02 vs 0 %/yr and 1.45 vs 0.44 %/yr) for the reduced and full dose groups, respectively. For non-CNS bleeds, rates were 10.89 vs 4.15 %/yr (p < 0.001, univariable) for the reduced and full doses, respectively. The mortality rate was 6.24 vs 1.75 %/yr (p = 0.001, univariable) for the reduced and full doses. Unlike the non-CNS bleed rate, mortality rate differences remained significant when adjusted for baseline characteristics. Thus, DOACs in patients ≥ 80 with AF effectively reduce SSE with a low risk of CNS bleeding, independent of DOAC dose. The higher non-CNS bleed rate and not the mortality rate is explained by the higher risk baseline characteristics in the reduced DOAC dose group. Further investigation of the etiology of non-CNS bleeds and mortality is warranted.
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Key Words
- A2.5, Apixaban 2.5 mg twice daily
- A5, Apixaban 5 mg twice daily
- AF, atrial fibrillation
- Atrial fibrillation
- BMMSA, Bryn Mawr Medical Specialists Association
- CKD, chronic kidney disease
- CNS, central nervous system
- CrCl, creatinine clearance
- D110, Dabigatran 110 mg twice daily
- D150, Dabigatran 150 mg twice daily
- D75, Dabigatran 75 mg twice daily
- DOAC
- DOACs, direct-acting oral anticoagulants
- Direct-acting oral anticoagulants
- ESRD, end-stage renal disease
- Elderly
- FDA, Food and Drug Administration
- R15, Rivaroxaban 15 mg daily
- R20, Rivaroxaban 20 mg daily
- SSE, stroke and systemic embolization
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Stroke Prevention in Atrial Fibrillation: A Scientific Statement of JACC: Asia (Part 2). JACC. ASIA 2022; 2:519-537. [PMID: 36624790 PMCID: PMC9823285 DOI: 10.1016/j.jacasi.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/29/2022] [Accepted: 06/22/2022] [Indexed: 01/12/2023]
Abstract
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia and is associated with substantial increases in the risk for stroke and systemic thromboembolism. With the successful introduction of the first non-vitamin K antagonistdirect oral anticoagulant agent (NOAC) in 2009, the role of vitamin K antagonists has been replaced in most clinical settings except in a few conditions for which NOACs are contraindicated. Data for the use of NOACs in different clinical scenarios have been accumulating in the past decade, and a more sophisticated strategy for patients with AF is now warranted. JACC: Asia recently appointed a working group to summarize the most updated information regarding stroke prevention in AF. The aim of this statement is to provide possible treatment options in daily practice. Local availability, cost, and patient comorbidities should also be considered. Final decisions may still need to be individualized and based on clinicians' discretion. This is part 2 of the statement.
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XANTUS-EL: A real-world, prospective, observational study of patients treated with rivaroxaban for stroke prevention in atrial fibrillation in Eastern Europe, Middle East, Africa and Latin America. Egypt Heart J 2018; 70:307-313. [PMID: 30591748 PMCID: PMC6303362 DOI: 10.1016/j.ehj.2018.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 09/02/2018] [Indexed: 12/04/2022] Open
Abstract
Background The prospective, observational XANTUS study demonstrated low rates of stroke and major bleeding in real-world rivaroxaban-treated patients with non-valvular atrial fibrillation (NVAF) from Western Europe, Canada and Israel. XANTUS-EL is a component of the overall XANTUS programme and enrolled patients with NVAF treated with rivaroxaban from Eastern Europe, the Middle East and Africa (EEMEA) and Latin America. Methods Patients with NVAF starting rivaroxaban for stroke prevention were consecutively recruited and followed for 1 year, at approximately 3-month intervals, or for ≥30 days after permanent rivaroxaban discontinuation. Primary outcomes were major bleeding, adverse events (AEs), serious AEs and all-cause mortality. Secondary outcomes included stroke, non-central nervous system systemic embolism (non-CNS SE), transient ischaemic attack (TIA), myocardial infarction (MI) and non-major bleeding. All major outcomes were centrally adjudicated. Results Overall, 2064 patients were enrolled; mean age ± standard deviation was 67.1 ± 11.32 years; 49.3% were male. Co-morbidities included heart failure (30.9%), hypertension (84.2%), diabetes mellitus (26.5%), prior stroke/non-CNS SE/TIA (16.2%) and prior MI (10.7%). Mean CHADS2, CHA2DS2-VASc and HAS-BLED scores were 2.0, 3.6 and 1.6, respectively. Treatment-emergent event rates were (events/100 patient-years, [95% confidence interval]): major bleeding 0.9 (0.5–1.4); all-cause mortality 1.7 (1.2–2.4); stroke/non-CNS SE 0.7 (0.4–1.2); any AE 18.1 (16.2–20.1) and any serious AE 8.3 (7.0–9.7). One-year treatment persistence was 81.9%. Conclusions XANTUS-EL confirmed low stroke and major bleeding rates in patients with NVAF from EEMEA and Latin America. The population was younger but with more heart failure and hypertension than XANTUS; stroke/SE rate was similar but major bleeding lower.
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Key Words
- AE, adverse event
- AF, atrial fibrillation
- CI, confidence interval
- CNS, central nervous system
- CrCl, creatinine clearance
- EEMEA
- EEMEA, Eastern Europe the Middle East and Africa
- ISTH, International Society on Thrombosis and Haemostasis
- Latin America
- MI, myocardial infarction
- NOAC, non-vitamin K antagonist oral anticoagulant
- NVAF, non-valvular atrial fibrillation
- PE, pulmonary embolism
- Real-world
- Rivaroxaban
- SAE, serious adverse event
- SD, standard deviation
- SE, systemic embolism
- Stroke prevention
- TIA, transient ischaemic attack
- VKA, vitamin K antagonist
- od, once daily
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Emerging Tools for Stroke Prevention in Atrial Fibrillation. EBioMedicine 2016; 4:26-39. [PMID: 26981569 PMCID: PMC4776061 DOI: 10.1016/j.ebiom.2016.01.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/07/2016] [Accepted: 01/14/2016] [Indexed: 02/02/2023] Open
Abstract
Ischaemic strokes resulting from atrial fibrillation (AF) constitute a devastating condition for patients and their carers with huge burden on health care systems. Prophylactic treatment against systemic embolization and ischaemic strokes is the cornerstone for the management of AF. Effective stroke prevention requires the use of the vitamin K antagonists or non-vitamin K oral anticoagulants (NOACs). This article summarises the latest developments in the field of stroke prevention in AF and aims to assist physicians with the choice of oral anticoagulant for patients with non-valvular AF with different risk factor profile.
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Key Words
- Atrial fibrillation
- CKD, chronic kidney disease
- CrCl, creatinine clearance
- DM, diabetes mellitus
- ESRF, end stage renal failure
- HF, heart failure
- HTN, hypertension
- ICH, intracranial haemorrhage
- INR, international normalised ratio
- LV, left ventricle
- NCB, net clinical benefit
- NICE, National institute for Health and Care Excellence
- NVAF, non-valvular atrial fibrillation
- Net clinical benefit
- Non-vitamin K oral anticoagulants
- Oral anticoagulation
- PCI, percutaneous coronary intervention
- RSM, risk stratification model
- Risk stratification
- SE, systemic embolism
- Stroke prevention
- TE, thromboembolic episode
- TIA, transient ischaemic attack
- TTR, time in therapeutic range
- eGFR, estimated glomerular filtration rate
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Variables affecting adolescent renal function in patients born with vesico-ureteric reflux. Arab J Urol 2015; 12:137-41. [PMID: 26019938 PMCID: PMC4434434 DOI: 10.1016/j.aju.2014.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 10/06/2013] [Accepted: 02/10/2014] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE To examine whether factors in a child's perinatal history influence renal function in adolescence, using a cross-sectional study, as during the past two decades researchers have tried to ascertain whether factors such as low birth weight might be related to a decline in kidney function in adolescence, although published data for children born with vesico-ureteric reflux (VUR) remain insufficient. PATIENTS AND METHODS Sixty-one children (20 boys and 41 girls), born between 1985 and 1989 in Greece and diagnosed with VUR, were assessed. A detailed personal and family history was taken and basic anthropometric variables were measured. Kidney function was calculated from serum creatinine levels, and the glomerular filtration rate (GFR), fractional excretion of sodium, albumin levels in urine, creatinine clearance, cystatin C level and the dimensions of each kidney were measured. RESULTS The results showed a positive relationship of birth weight (P = 0.01) with blood pressure in adolescence in children diagnosed with any degree of VUR. Renal function seemed to be intact whatever the cause of VUR, the volume of the kidneys in adolescence (P = 0.386 and 0.483, respectively, for the right and left kidney) and the values of GFR (P = 0.105), creatinine clearance (P = 0.213) and cystatin C (P = 0.055). CONCLUSIONS These results showed that although there is a positive association between blood pressure in adolescence and birth weight, in children born with VUR there was no deterioration in renal function. Kidneys seem to function normally regardless of the gestational age at birth.
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Diffusion weighted imaging and diffusion tensor imaging in the evaluation of transplanted kidneys. Eur J Radiol Open 2015; 2:71-80. [PMID: 26937439 PMCID: PMC4750625 DOI: 10.1016/j.ejro.2015.05.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 05/04/2015] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVE The aim of this study is to investigate the relation between renal indexes and functional MRI in a population of kidney transplant recipients who underwent MR with diffusion-weighted imaging (DWI) and diffusion tensor imaging (DTI) of the transplanted graft. METHOD Study population included 40 patients with single kidney transplant. The patients were divided into 3 groups, on the basis of creatinine clearance (CrCl) values calculated using Cockcroft-Gault formula: group A, including patients with normal renal function (CrCl ≥ 60 mL/min); group B, which refers to patients with moderate renal impairment (CrCl > 30 but <60 mL/min); and, finally, group C, which means severe renal deterioration (CrCl ≤ 30 mL/min). All patients were investigated with a 1.5 Tesla MRI scanner, acquiring DWI and DTI sequences. A Mann-Whitney U test was adopted to compare apparent diffusion coefficients (ADCs) and fractional anisotropy (FA) measurements between groups. Receiver operating characteristic (ROC) curves were created for prediction of normal renal function (group A) and renal failure (group C). Pearson correlation was performed between renal clearance and functional imaging parameter (ADC and FA), obtained for cortical and medullar regions. RESULTS Mann-Whitney U test revealed a highly significant difference (p < 0.01) between patients with low CrCl (group C) and normal CrCl (group A) considering both medullar ADC and FA and cortical ADC. Regarding contiguous groups, the difference between group B and C was highly significant (p < 0.01) for medullar ADC and significant (p < 0.05) for cortical ADC and medullar FA. No difference between these groups was found considering cortical FA. Analyzing groups A and B, we found a significant difference (p < 0.05) for medullar both ADC and FA, while no difference was found for cortical ADC and FA. Strongest Pearson correlation was found between CrCl and medullar ADC (r = 0.65). For predicting normal renal function or severe renal impairment, highest values of AUC were observed using medullar ADC cut-off values (respectively 0.885 and 0.871); medullar FA showed also high accuracy (respectively 0.831 and 0.853). CONCLUSIONS DWI and DTI are promising tools for non-invasive monitoring of renal function; medullar ADC proved to be the best parameter for renal function assessment.
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Protection against renal ischaemia/reperfusion injury: A comparative experimental study of the effect of ischaemic preconditioning vs. postconditioning. Arab J Urol 2012; 10:418-24. [PMID: 26558061 PMCID: PMC4442954 DOI: 10.1016/j.aju.2012.08.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 07/28/2012] [Accepted: 08/15/2012] [Indexed: 12/23/2022] Open
Abstract
Objective To compare the effect of ischaemic preconditioning (Ipre) vs. ischaemic postconditioning (Ipost) on renal ischaemia/reperfusion (I/R) injury in rats. Materials and methods In all, 120 male Sprague–Dawley rats were classified into four groups of 30 rats each, designated sham, control, Ipre and Ipost. Renal function, including serum creatinine, blood urea nitrogen (BUN), creatinine clearance (CrCl), fractional Na excretion (FENa) and renal histopathology were measured at 2, 24 and 48 h after ischaemia. Markers of lipid peroxidation (malondialdehyde, MDA), superoxide dismutase (SOD) and reduced glutathione (GSH) were measured in kidney tissues during the same intervals. Results Ipre caused a significant improvement in renal function, as indicated by a significant decrease in serum creatinine, BUN and FENa, with a significant increase in CrCl. However, Ipost caused no significant improvement in renal function. Morphologically Ipre caused a marked significant improvement in the renal tubular damage score compared to Ipost. Also, Ipre caused a significant decrease in MDA, and significant increase in GSH and SOD when compared to Ipost. Conclusion Ipre is more potent than Ipost for improving the renal injury induced by I/R. Ipre caused a marked improvement in renal function and morphology, while Ipost caused a minimal improvement in morphology only. Moreover, Ipre caused a marked and significant reduction in oxidative stress in kidney tissues, while Ipost caused a minimal reduction.
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Key Words
- BUN, blood urea nitrogen
- CrCl, creatinine clearance
- FENa, fractional Na excretion
- GSH, reduced glutathione
- H&E, haematoxylin and eosin
- I/R, ischaemia/reperfusion
- Ipost, ischaemic postconditioning
- Ipre, ischaemic preconditioning
- Ischaemia/reperfusion
- MDA, malondialdehyde
- OSOM, outer stripe of the outer medulla
- Oxidative stress
- Postconditioning
- Preconditioning
- ROS, reactive oxygen species
- Rat
- SOD, superoxide dismutase
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The ZOTECT study: Effect of zoledronic acid on bone metabolism in patients with bone metastases from prostate or breast cancer. J Bone Oncol 2012; 1:88-94. [PMID: 26909262 PMCID: PMC4723349 DOI: 10.1016/j.jbo.2012.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 07/10/2012] [Accepted: 07/10/2012] [Indexed: 11/16/2022] Open
Abstract
Purpose The ZOTECT study assesses the effect of zoledronic acid (ZOL) on bone-marker levels and potential correlations with disease outcomes in bisphosphonate-naive patients. Methods This prospective, single-arm, open-label study in bisphosphonate-naive (≥6 months) patients with bone metastases from prostate cancer (PC; n=301) or breast cancer (BC; n=99) enrolled at 98 German sites (May 2006 to July 2008) investigated the effect of ZOL (4 mg intravenously every 4 weeks×4 months, with a final follow-up at 12 months) on bone-marker levels. Secondary assessments: skeletal-related event (SRE) rate, pain, quality of life (QoL), and prostate-specific antigen levels. Endpoints were assessed using summary statistics by visit/tumor type and Kaplan–Meier analyses. Results ZOL treatment significantly decreased bone-marker levels (amino-terminal propeptide of type I collagen [P1NP], C-terminal cross-linking telopeptide of type I collagen [CTX]; P<0.0001), and this decrease was maintained through the final 1-year follow-up visit. Baseline P1NP and CTX levels correlated with extent of bone disease (P<0.0001, each) and on-treatment decreases in marker levels. Skeletal disease burden and bone-marker levels were similar between PC and BC patients, and ZOL did not significantly influence osteoprotegerin/receptor activator of nuclear factor-κB ligand levels. Only 13 SREs occurred in 11 patients, supporting the known ZOL-mediated reduction in SREs. On-treatment bone-marker level changes did not correlate with SRE rate, pain scores, or QoL. Generally, ZOL was well tolerated and adverse events were consistent with its known safety profile. Conclusions This study confirms that ZOL therapy significantly reduces bone turnover (measured as P1NP and CTX levels) in patients with bone metastases from PC or BC.
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Key Words
- AE, adverse events
- BC, breast cancer
- Bone marker
- Bone metastases
- CTX
- CTX, C-terminal cross-linking telopeptide of type I collagen
- Cancer
- CrCl, creatinine clearance
- ECOG, Eastern Cooperative Oncology Group
- EORTC, European Organisation for Research and Treatment of Cancer
- ITT, intent-to-treat
- NTX, urinary N-telopeptide
- OPG, osteoprotegerin
- P1NP
- P1NP, amino-terminal propeptide of type I collagen
- PC, prostate cancer
- PSA, prostate-specific antigen
- QoL, quality of life
- RANKL, receptor activator of nuclear factor-κB ligand
- SRE, skeletal-related event
- ULN, upper limit of normal
- VAS, visual analogue scale
- ZOL, zoledronic acid
- Zoledronic acid
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