Comparison of Anticoagulant Therapy for Atrial Fibrillation - Novel Oral Anticoagulants Versus Vitamin K Antagonists

2018 ◽  
Vol 60 (4-5) ◽  
pp. 514-523 ◽  
Author(s):  
Sean T. Chen ◽  
Manesh R. Patel
2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Francesco Vetta ◽  
Gabriella Locorotondo ◽  
Giampaolo Vetta

Prevalence of non-valvular atrial fibrillation is increasing over time. Particularly in elderly population, treatment strategies to reduce the rate of stroke are challenging and still represent an unsolved cultural question. Indeed, the risk of thromboembolism increases in the elderly in parallel with the risk of bleeding. The frequent coexistence of several morbidities, frailty syndrome, polypharmacy, chronic kidney disease and dementia strengthens the perception that risk-benefit ratio of anticoagulant therapy could be unfavorable, and explains why such treatment is underused in the elderly. Recently, the introduction of non-vitamin K oral anticoagulants (NOACs) has allowed us to overcome the large number of limitations imposed by the use of vitamin K antagonists. In this manuscript, the benefits of individual NOACs in comparison with warfarin in elderly patients are reviewed. Targeted studies on complex elderly patients are needed to test usefulness of a geriatric comprehensive assessment, besides the scores addressing risk of thromboembolic and hemorrhagic events. In the meantime, it is mandatory that use of anticoagulant therapy in most elderly people, currently excluded from randomized controlled trials, is prudent and responsible.


Author(s):  
Priyanka P K ◽  
Mathew George ◽  
Lincy Joseph

Atrial fibrillation (AF) is characterized as an extremely rapid and disorganized atrial activation. These irregular heartbeats will cause blood to collect within the heart and potentially form a clot, which can travel to a person’s brain and cause a stroke. AF increases stroke risk by 3 to 5 fold. Vitamin K antagonists (VKAs) are highly effective for the prevention of stroke, mainly of ischemic origin, in patients with AF. For this reason, VKAs are currently recommended in all AF patients at moderate to high risk for stroke or systemic embolism (SSE). VKAs have significant limitations, particularly their unpredictable anticoagulant response and numerous food and drug interactions, mandating regular laboratory monitoring. These limitations make treatment with VKAs problematic for many patients; as a result, only about half of all potentially eligible AF patients are treated with VKAs. Over the last several years, novel oral anticoagulant drugs (NOACs), including direct thrombin inhibitors (dabigatran) and factor Xa inhibitors (apixaban & rivaroxaban), have been developed. New orally administered anticoagulant drugs have emerged as potential alternatives to VKAs for the prevention of ischaemic stroke or systemic embolism in patients with chronic atrial fibrillation. Novel oral anticoagulants (NOACs), due to their a lot of predictable therapeutic result and more favorable haemorrhagic risk profile, represent a particularly attractive therapeutic option in AF patients. Keywords:  Novel oral anticoagulants (NOACs), Vitamin K antagonist (VKAs), Atrial fibrillation, Apixaban, Dabigatran, Rivaroxaban.


Medicina ◽  
2019 ◽  
Vol 55 (10) ◽  
pp. 617 ◽  
Author(s):  
Caturano ◽  
Galiero ◽  
Pafundi

Atrial fibrillation (AF) is the most common arrhythmia, ranging from 0.1% in patients <55 years to >9% in octogenarian patients. One important issue is represented by the 5-fold increased ischemic stroke risk in AF patients. Hence, the role of anticoagulation is central. Until a few years ago, vitamin K antagonists (VKAs) and low molecular weight heparin represented the only option to prevent thromboembolisms, though with risks. Novel oral anticoagulants (NOACs) have radically changed the management of AF patients, improving both life expectancy and life quality. This review aims to summarize the most recent literature on the use of VKAs and NOACs in AF, in light of the new findings.


Heart Rhythm ◽  
2018 ◽  
Vol 15 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Rhanderson Cardoso ◽  
Leonardo Knijnik ◽  
Aditya Bhonsale ◽  
Jared Miller ◽  
Guilherme Nasi ◽  
...  

2017 ◽  
Vol 24 (5) ◽  
pp. e553-e558 ◽  
Author(s):  
Diana Ţînţ ◽  
Antoniu O. Petriş ◽  
Ioana Pop ◽  
Rimma Melnic ◽  
Andreea-Mihaela Ignat ◽  
...  

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