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Record W2137820292 · doi:10.4212/cjhp.v66i5.1286

Management of Stroke Prevention in Canadian Patients with Atrial Fibrillation at Moderate to High Risk of Stroke

2013· article· en· W2137820292 on OpenAlexaffvenueabout
William Semchuk, B. Levac, Muria Lara, Annabelle Shakespeare, Thomas Evers, Jennifer Bolt

Bibliographic record

VenueThe Canadian Journal of Hospital Pharmacy · 2013
Typearticle
Languageen
FieldMedicine
TopicAtrial Fibrillation Management and Outcomes
Canadian institutionsRegina Qu'Appelle Health Region
Fundersnot available
KeywordsAtrial fibrillationMedicineStroke (engine)Anticoagulant therapyManagement of atrial fibrillationInternal medicineEmergency medicinePediatrics

Abstract

fetched live from OpenAlex

Background: Many patients with atrial fibrillation who are at moderate to high risk of stroke do not receive anticoagulation with vitamin K antagonists (VKAs) in accordance with recommendations.Objective: To determine (1) why Canadian patients with atrial fibrillation who are potentially eligible for VKA do not receive this therapy, (2) why Canadian primary care physicians discontinue VKA therapy, and (3) why VKA therapy is perceived as difficult to manage.Methods: The study involved a chart review of 3 cohorts of patients with nonvalvular atrial fibrillation at moderate to high risk of stroke: patients who had never received VKA treatment (VKA-naive), those whose treatment had been discontinued, and those whose VKA treatment was considered difficult to manage.Results: Charts for 187 patients (mean age 78.4 years, standard deviation 8.9 years) treated at 39 primary care sites were reviewed (62 treatment-naive, 42 with therapy discontinued, and 83 whose therapy was considered difficult to manage). Atrial fibrillation was paroxysmal in 82 (44%) of the patients, persistent in 47 patients (25%), and permanent in 58 (31%). One patient in each of the 3 cohorts had experienced a stroke during the 6 months before study participation. Bleeding events were more frequent among patients who had discontinued VKA therapy than in the other 2 groups. Among those whose therapy was discontinued and those whose therapy was difficult to manage, the mean time in the therapeutic range was 46.3% and 56.4%, respectively. The most common reason for not initiating VKA therapy in treatment-naive patients was the transient nature of atrial fibrillation (25/62 [40%]). The most common reason for discontinuation of VKA therapy was a bleeding event (10/42 [24%]). The presence of a concomitant chronic disease was the most common reason that a patient’s therapy was considered difficult to manage (46/83 [55%]).Conclusions: VKA therapy was not initiated or was discontinued for various reasons. Multiple comorbid conditions made management of VKA therapy more difficult. These findings reflect the challenges that primary care physicians experience in managing the care of patients with atrial fibrillation.RÉSUMÉContexte : De nombreux patients atteints d’une fibrillation auriculaire (FA) et présentant un risque d’accident vasculaire cérébral (AVC) modéré ou élevé ne reçoivent pas d’anticoagulothérapie par un antagoniste de la vitamine K, conformément aux recommandations.Objectif : Déterminer 1) pourquoi les patients canadiens atteints d’une FA et qui sont des candidats potentiels à l’anticoagulothérapie par un antagoniste de la vitamine K ne reçoivent pas ce traitement, 2) pourquoi les médecins canadiens de soins primaires interrompent l’anticoagulothérapie par un antagoniste de la vitamine K, et 3) pourquoi la prise en charge d’un tel traitement est considérée comme difficile.Méthodes: Cette étude comportait une analyse des dossiers médicaux des patients de trois cohortes atteints d’une FA non valvulaire et considérés comme présentant un risque modéré ou élevé d’AVC : patients qui n’avaient jamais reçu d’anticoagulothérapie par un antagoniste de la vitamine K, patients chez qui ce traitement avait été interrompu et patients chez qui la prise en charge de ce traitement était considérée comme difficile.Résultats : Les dossiers médicaux de 187 patients (âge moyen de 78,4 ans, écart-type de 8,9 ans) traités dans 39 établissements de soins primaires ont été analysés (62 : jamais traités, 42 : traitement interrompu et 83 : prise en charge considérée comme difficile). On a répertorié 82 (44 %) cas de FA paroxystique, 47 (25 %) cas de FA persistante et 58 (31 %) cas de FA permanente. Un patient dans chacune des trois cohortes a eu un AVC durant les six mois précédant sa participation à cette étude. Les saignements étaient plus fréquents parmi les patients chez qui on avait interrompu le traitement par l’antagoniste de la vitamine K que chez ceux des deux autres groupes. Parmi les patients chez qui le traitement avait été interrompu ou sa prise en charge était considérée comme difficile, le temps moyen dans l’écart thérapeutique était respectivement de 46,3 % et de 56,4 %. La raison la plus souvent évoquée pour ne pas instaurer le traitement par un antagoniste de la vitamine K chez les patients n’ayant jamais reçu un tel traitement était la nature passagère de la FA (25/62 [40 %]). La raison la plus souvent évoquée pour interrompre ce traitement était les saignements (10/42 [24%]). La présence d’une comorbidité chronique était la raison la plus souvent évoquée pour expliquer la prise en charge difficile de ce traitement (46/83 [55 %]).Conclusions : L’anticoagulothérapie par un antagoniste de la vitamine K n’était pas instaurée ou était interrompue pour diverses raisons. La présence de multiples comorbidités rendait sa prise en charge plus difficile. Ces résultats reflètent les difficultés des médecins de soins primaires dans la prise en charge des patients atteints de fibrillation auriculaire.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.003
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: none
Teacher disagreement score0.179
Threshold uncertainty score0.360

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.003
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0020.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.018
GPT teacher head0.277
Teacher spread0.259 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreReview

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations2
Published2013
Admission routes3
Has abstractyes

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