scholarly journals Evaluation of the Modified SAMe-TT2R2 Score to Predict Good Anticoagulation Control with Warfarin Among non-valvular Atrial Fibrillation Patients

2021 ◽  
pp. 1-4
Author(s):  
Reem Bahmaid ◽  
◽  
Filwah Almarzouq ◽  
Keyword(s):  
Atrial Fibrillation ◽  
Vitamin K ◽  
Warfarin Therapy ◽  
Vitamin K Antagonists ◽  
Vitamin K Antagonist ◽  
Caucasian Population ◽  
Caucasian Race ◽  
Universal Relationship ◽  
Small Cohort ◽  
Good Relation

Background: The SAMe-TT2 R2 Score was developed to identify vitamin K antagonists control outliers before non-valvular atrial fibrillation (AF) patients start treatment. SAMe-TT2 R2 Score was derived and validated using a primarily white Caucasian population to predict TTR. Given that non-Caucasian race already confers 2 points in this score, the SAMe-TT2 R2 score requires validation and/or re-calibration despite race of population. Method: We conducted a cohort retrospective study that included all non-valvular atrial fibrillation patients who were on warfarin therapy from January to December 2019. Then we calculated the modified SAMe-TT2 R2 and SAMe-TT2 R2 for all study populations and we correlated the result with patients' TTR. The TTR was calculated through the Rosendaal's method. Results: We had 662 patient using warfarin therapy, among those 662, 60.9% were under cardiology and using it for cardiac indication, and only 18.1% diagnosed to have non-valvular AF. Modified SAMe-TT2 R2 score has good relation to original SAMe-TT2 R2 score as showed 75.71% (95% CI. 63.99 to 85.17%), 100% (95% CI. 92.89 to 100%) and 15% (95% CI. 3.21 to 77.95%); accuracy, sensitivity and specificity in relation to SAMe-TT2 R2 respectively. In addition to that in this small cohort we found that there is universal relationship between SAMe-TT2 R2 score, Modified SAMe-TT2 R2 score and TTR; TTR >=65% associate with low score (<2) of both SAMe-TT2 R2 , Modified SAMe-TT2 R2 score. Conclusion: The use of Modified SAMe-TT2 R2 score allows clinicians to make an informed decision on whether to start vitamin K antagonist or other non-vitamin K antagonist oral anticoagulant despite the race of the patients.

scholarly journals The Risk of Gastrointestinal Bleeding between Non-Vitamin K Antagonist Oral Anticoagulants and Vitamin K Antagonists in the Asian Atrial Fibrillation Patients: A Meta-Analysis

2020 ◽  
Vol 18 (1) ◽  
pp. 137
Author(s):  
Kuang-Tsu Yang ◽  
Wei-Chih Sun ◽  
Tzung-Jiun Tsai ◽  
Feng-Woei Tsay ◽  
Wen-Chi Chen ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Gastrointestinal Bleeding ◽  
Vitamin K ◽  
Meta Analysis ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Vitamin K Antagonist ◽  
Cochrane Library ◽  
Secondary Outcome ◽  
Optimal Dosage

Background: Non-vitamin K antagonist oral anticoagulants (NOACs) are more commonly used to prevent atrial fibrillation (AF) patients from thromboembolic events than vitamin K antagonists (VKAs). However, the gastrointestinal bleeding (GIB) risk in the Asian AF patients associated with NOACs in comparison with VKAs remained unaddressed. Materials and Methods: A systematic search of studies on NOACs and VKAs in the Asian AF patients was conducted in PubMed, Cochrane Library, and ClinicalTrials.gov. The primary outcome was the hazard ratio (HR) of any GIB associated with NOACs versus VKAs. The secondary outcome was the GIB risks in different kinds of NOACs compared with VKAs. Results: This meta-analysis included two randomized controlled trials (RCTs) and four retrospective studies, comprising at least 200,000 patients in total. A significantly lower HR of GIB risks was found in all kinds of NOACs than VKAs in the Asian AF patients (HR: 0.633; 95% confidence interval: 0.535–0.748; p < 0.001). Additionally, the GIB risks of different NOACs were apixaban (HR: 0.392), edoxaban (HR: 0.603), dabigatran (HR: 0.685), and rivaroxaban (HR: 0.794), respectively. Conclusions: NOACs significantly reduced the risk of GIB in the Asian AF patients compared with VKAs. In the four NOACs compared with VKAs, apixaban probably had a trend of the least GIB risk. We need further head-to-head studies of different NOACs to confirm which NOAC is the most suitable for Asian AF patients and to know the optimal dosage regimen of different NOACs.

HEMATURIA AND OTHER KINDS OF BLEEDINGS ON NON-VITAMIN K ANTAGONIST ORAL ANTICOAGULANTS IN PATIENTS WITH ATRIAL FIBRILLATION: AN UPDATED OVERVIEW ON OCCURRENCE, PATHOMECHANISMS AND MANAGEMENT

2020 ◽  
Vol 73 (11) ◽  
pp. 2528-2534
Author(s):  
Dagmara Wojtowicz ◽  
Anna Tomaszuk-Kazberuk ◽  
Jolanta Małyszko ◽  
Marek Koziński
Keyword(s):  
Atrial Fibrillation ◽  
Vitamin K ◽  
Anticoagulant Activity ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Vitamin K Antagonist ◽  
Bleeding Complications ◽  
Reversal Agents ◽  
Limited Availability ◽  
Increased Risk

Non-vitamin K antagonist oral anticoagulants (NOACs) are currently recommended for oral anticoagulation in patients with non-valvular atrial fibrillation. In the setting, NOACs effectively prevent from stroke and systemic embolic events. In spite of the favorable safety profile of NOACs when compared with vitamin K antagonists, the use of any kind of anticoagulation is associated with an increased risk of bleeding. However, there is still a lack of direct comparisons of effectiveness and safety among NOACs. The results of indirect comparisons and meta-analyses suggest that the risk of various types of hemorrhagic complications differ among the particular NOACs. Management of bleeding in patients under NOAC therapy can be challenging because of limited availability of antidotes and the lack of routine laboratory test monitoring the NOAC anticoagulant effect. In case of life-threatening or critical site bleeding, reversal of NOAC anticoagulant activity is essential together with immediate implementation of causative treatment. Moreover, some patients on chronic NOAC therapy may require urgent surgery or invasive procedures. Specific reversal agents for NOACs have been developed, i.e. more widely available idarucizumab for the factor IIa inhibitor (dabigatran) and andexanet alfa for the factor Xa inhibitors (rivaroxaban, apixaban, edoxaban) with limited availability. This review summarizes the occurrence and management of NOAC-related bleeding complications with a particular emphasis on hematuria.

The NOACs: clinical pharmacology

ESC CardioMed ◽  
2018 ◽  
pp. 268-272
Author(s):  
Jeffrey Weitz
Keyword(s):  
Atrial Fibrillation ◽  
Vitamin K ◽  
Active Site ◽  
Randomized Clinical Trials ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Factor Xa ◽  
Vitamin K Antagonist ◽  
Phase Iii ◽  
High Affinity

The limitations of vitamin K antagonists prompted the development of new oral anticoagulants that could be administered in fixed doses without routine coagulation monitoring. Focusing on thrombin and factor Xa because of their prominent roles in coagulation, structure-based design led to the development of small molecules that bind to the active site pockets of these enzymes with high affinity and specificity. Four non-vitamin K antagonist oral anticoagulants are now licensed: dabigatran, which inhibits thrombin, and rivaroxaban, apixaban, and edoxaban, which inhibit factor Xa. In phase III randomized clinical trials that included over 100,000 patients these agents have proven to be at least as effective as vitamin K antagonists for prevention of stroke in patients with non-valvular atrial fibrillation and for treatment of venous thromboembolism, and to produce less bleeding, particularly less intracranial bleeding.

scholarly journals Non-vitamin K antagonist oral anticoagulants vs. vitamin-K antagonists in patients with atrial fibrillation and chronic kidney disease: a nationwide cohort study

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Emma Kirstine Laugesen ◽  
Laila Staerk ◽  
Nicholas Carlson ◽  
Anne-Lise Kamper ◽  
Jonas Bjerring Olesen ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Vitamin K ◽  
Major Bleeding ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Vitamin K Antagonist ◽  
All Cause Mortality ◽  
Comparable Population

Abstract Background We aimed to compare effectiveness and safety of non-vitamin K antagonist oral anticoagulants (NOACs) versus vitamin-K antagonists (VKA) in atrial fibrillation (AF) patients with chronic kidney disease (CKD) not receiving dialysis. Methods By using personal identification numbers, we cross-linked individual-level data from Danish administrative registries. We identified every citizen with a prior diagnosis of AF and CKD who initiated NOAC or VKA (2011–2017). An external analysis of 727 AF patients with CKD (no dialysis) was performed to demonstrate level of kidney function in a comparable population. Study outcomes included incidents of stroke/thromboembolisms (TEs), major bleedings, myocardial infarctions (MIs), and all-cause mortality. We used Cox proportional hazards models to determine associations between oral anticoagulant treatment and outcomes. Results Of 1560 patients included, 1008 (64.6%) initiated VKA and 552 (35.4%) initiated NOAC. In a comparable population we found that 95.3% of the patients had an estimated glomerular filtration rate (eGFR) < 59 mL/min. Patients treated with NOAC had a significantly decreased risk of major bleeding (hazard ratio (HR): 0.47, 95% confidence interval (CI): 0.26–0.84) compared to VKA. There was not found a significant association between type of anticoagulant and risk of stroke/TE (HR: 0.83, 95% CI: 0.39–1.78), MI (HR: 0.45, 95% CI: 0.18–1.11), or all-cause mortality (HR: 0.99, 95% CI: 0.77–1.26). Conclusion NOAC was associated with a lower risk of major bleeding in patients with AF and CKD compared to VKA. No difference was found in risk of stroke/TE, MI, and all-cause mortality.

Selection, management, and outcome of vitamin K antagonist-treated patients with atrial fibrillation not switched to novel oral anticoagulants

2015 ◽  
Vol 114 (11) ◽  
pp. 1076-1084 ◽  
Author(s):  
Franziska Michalski ◽  
Luise Tittl ◽  
Sebastian Werth ◽  
Ulrike Hänsel ◽  
Sven Pannach ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Vitamin K ◽  
Major Bleeding ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Case Fatality ◽  
Bleeding Risk ◽  
Vitamin K Antagonist ◽  
Bleeding Complications ◽  
Treatment Rate

SummaryAtrial fibrillation (AF) patients treated with well-controlled vitamin K antagonists (VKAs) may benefit less from non-vitamin K antagonist oral anticoagulants (NOACs) because they are supposed to be at low risk of thromboembolic and bleeding complications. However, little is known about the selection, management, and outcome of such “stable” VKA patients in current practice. We assessed characteristics, VKA persistence and 12 months' outcome of AF patients selected for VKA continuation. On March 1, 2013, the Dresden NOAC registry opened recruitment of patients continuing on VKA for sites that had been actively recruiting AF patients treated with NOACs in the prior 18 months. Patient characteristics were compared with those of NOAC patients from the same sites. Four hundred twenty-seven VKA patients had a significantly lower bleeding risk profile compared with 706 patients selected for NOAC treatment. For VKA, international normalised ratio time-in-therapeutic range before enrolment was 71% and increased to 75% during a mean follow-up of 15 months. Rates of stroke/transient ischaemic attack/systemic embolism were 1.3/100 patient-years (intention-to-treat) and 0.94/100 patient-years (as-treated). On-treatment rate of ISTH major bleeding was 4.15/100 patient-years (95% CI 2.60–6.29) with a case-fatality rate of 16.3% (all-cause mortality at day 90 after major bleeding). In conclusion, in daily care, AF patients selected for VKA therapy are healthier than those treated with NOAC, demonstrate a high quality of anticoagulant control and very low stroke rates. However, despite adequate patient selection and INR control, the risk of major VKA bleeding is unacceptably high and bleeding outcome is poor.

scholarly journals Shifting from vitamin K antagonists to non-vitamin K antagonist oral anticoagulants in patients with atrial fibrillation: predictors, patterns and temporal trends

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Arthur Shiyovich ◽  
Varda Shalev ◽  
Gabriel Chodick ◽  
Matanya Tirosh ◽  
Amos Katz ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Vitamin K ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Temporal Trends ◽  
Female Gender ◽  
Healthcare Services ◽  
Vitamin K Antagonist ◽  
Incident Cases ◽  
Over Time

Abstract Background Non-Vitamin K antagonist oral anticoagulants (NOACs) emerged as an alternative with comparable or superior efficacy and safety to vitamin K antagonists (VKAs) for stroke prevention in patients with non-valvular atrial fibrillation (AF). Objectives The aim of the current study was to investigate the patterns, predictors, timelines and temporal trends of shifting from VKAs to NOACs. Methods In this retrospective observational study, the computerized database of a large healthcare provider in Israel, Maccabi Healthcare Services, was searched to identify patients with AF for whom either a VKA or NOAC was prescribed between 2012 and 2015. Time from diagnosis to therapy initiation and to shifting between therapies was evaluated. Results Out of 6987 eligible AF incident patients, 2338 (33.4%) initiated treatment with a VKA and 2221 (31.7%) with a NOAC. In addition, 5259 prevalent patients were analyzed. During the study period, NOAC prescriptions proportion among the newly diagnosed cases increased from 32 to 68.4% (p for trend <  0.001). The median time from diagnosis to first dispensing was greater in NOAC than VKA and decreased among patients treated with NOAC during the study period (2012: 1.9 and 0.3 months, 2015: 0.7 and 0.2 months, respectively). During follow-up, 3737 (49%) patients (54.3% and 47.1% of the incident and prevalent cases, respectively), shifted from a VKA to a NOAC, after a median of 22 months and 39 months in the incident and prevalent cases, respectively, decreasing throughout the study period. Female gender, younger age, southern district, higher CHADS2 and CHA2DS2-VASC score, non-smoking, and treatment with antiplatelets were associated with a greater likelihood for therapy shift. Shifting from a NOAC to a VKA decreased over time from 8 to 4.5% in 2012 to 0.5% and 0.7% in 2015 in the incident and prevalent groups, p <  0.001 respectively. Conclusions Shifting from VKA to NOAC occurred in 50% of the cases, more frequently among incident cases, and younger patients with greater stroke risk. Shifting from a NOAC to a VKA was much less frequent, yet it occurred more often in incident cases and decreased over time. A socially and economically sensitive program to optimize the initiation of OAC therapy upon diagnosis is warranted.

scholarly journals Vitamin K Antagonists, Non–Vitamin K Antagonist Oral Anticoagulants, and Vascular Calcification in Patients with Atrial Fibrillation

TH Open ◽  
2018 ◽  
Vol 02 (04) ◽  
pp. e391-e398 ◽  
Author(s):  
Frederique Peeters ◽  
Elton Dudink ◽  
Dorien Kimenai ◽  
Bob Weijs ◽  
Sibel Altintas ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Logistic Regression ◽  
Aortic Valve ◽  
Propensity Score ◽  
Vascular Calcification ◽  
Vitamin K ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Vitamin K Antagonist ◽  
Adjusted Logistic Regression

Background Vitamin K antagonists (VKAs) are associated with coronary artery calcification in low-risk populations, but their effect on calcification of large arteries remains uncertain. The effect of non–vitamin K antagonist oral anticoagulants (NOACs) on vascular calcification is unknown. We investigated the influence of use of VKA and NOAC on calcification of the aorta and aortic valve. Methods In patients with atrial fibrillation without a history of major adverse cardiac or cerebrovascular events who underwent computed tomographic angiography, the presence of ascending aorta calcification (AsAC), descending aorta calcification (DAC), and aortic valve calcification (AVC) was determined. Confounders for VKA/NOAC treatment were identified and propensity score adjusted logistic regression explored the association between treatment and calcification (Agatston score > 0). AsAC, DAC, and AVC differences were assessed in propensity score–matched groups. Results Of 236 patients (33% female, age: 58 ± 9 years), 71 (30%) used VKA (median duration: 122 weeks) and 79 (34%) used NOAC (median duration: 16 weeks). Propensity score–adjusted logistic regression revealed that use of VKA was significantly associated with AsAC (odds ratio [OR]: 2.31; 95% confidence interval [CI]: 1.16–4.59; p = 0.017) and DAC (OR: 2.38; 95% CI: 1.22–4.67; p = 0.012) and a trend in AVC (OR: 1.92; 95% CI: 0.98–3.80; p = 0.059) compared with non-anticoagulation. This association was absent in NOAC versus non-anticoagulant (AsAC OR: 0.51; 95% CI: 0.21–1.21; p = 0.127; DAC OR: 0.80; 95% CI: 0.36–1.76; p = 0.577; AVC OR: 0.62; 95% CI: 0.27–1.40; p = 0.248). A total of 178 patients were propensity score matched in three pairwise comparisons. Again, use of VKA was associated with DAC (p = 0.043) and a trend toward more AsAC (p = 0.059), while use of NOAC was not (AsAC p = 0.264; DAC p = 0.154; AVC p = 0.280). Conclusion This cross-sectional study shows that use of VKA seems to contribute to vascular calcification. The calcification effect was not observed in NOAC users.

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