Yi Zheng, Ying Liu, Xinyu Zheng, Gary Tse, Gregory Y H Lip, Kang-Yin Chen, Tong Liu
{"title":"Association between rivaroxaban and the prognosis of patients with acute myocardial infarction and new-onset atrial fibrillation.","authors":"Yi Zheng, Ying Liu, Xinyu Zheng, Gary Tse, Gregory Y H Lip, Kang-Yin Chen, Tong Liu","doi":"10.1093/postmj/qgaf163","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>New-onset atrial fibrillation (AF) in the setting of acute myocardial infarction (AMI) is associated with higher risks of stroke and mortality. However, current guidelines lack specific antithrombotic recommendations for this population. This study aimed to explore the association between rivaroxaban and the prognosis of patients with AMI and new-onset AF.</p><p><strong>Methods: </strong>This retrospective cohort study included patients with AMI and new-onset AF receiving dual antiplatelet therapy between August 2016 and June 2023 in Tianjin, China. New-onset AF (transient or nontransient) was defined as the first diagnosis of AF following AMI. The primary outcome was stroke.</p><p><strong>Results: </strong>2477 patients were identified, including 141 rivaroxaban users and 2336 patients without oral anticoagulants (OAC). Over a median follow-up of 922 days, rivaroxaban users had a 5.7% lower risk of stroke than non-OAC users, although this was not statistically significant (19.9% vs. 25.6%; P = .152). Despite the suggestion of a protective trend, multivariable Cox regression showed that rivaroxaban use was not associated with a lower risk of stroke (hazard ratio, 0.77; 95% confidence interval, 0.52-1.13, P = .187). After propensity score matching, 155 transient (rivaroxaban: 42; non-OAC: 113) and 295 nontransient AF patients (rivaroxaban: 85; non-OAC: 210) were included. No significant association was observed between rivaroxaban and stroke, ischemic stroke, hemorrhagic stroke, all-cause mortality, cardiovascular mortality, bleeding, or major bleeding.</p><p><strong>Conclusion: </strong>No significant association was observed between rivaroxaban and clinical outcomes in patients with AMI and new-onset AF. Given the small sample size and limited statistical power, the findings are exploratory and require further validation. Key messages What is already known on this topic: Evidence from previous studies indicates that acute myocardial infarction (AMI) patients with new-onset atrial fibrillation (AF) are associated with higher risks of ischemic stroke and mortality. However, the association between rivaroxaban and the prognosis of patients with AMI and new-onset AF remains uncertain. What this study adds: Among patients with AMI and new-onset AF receiving dual antiplatelet therapy, no significant differences were observed between rivaroxaban users and non-oral anticoagulant users in terms of the risks of stroke, ischemic stroke, hemorrhagic stroke, all-cause mortality, cardiovascular mortality, bleeding, or major bleeding. However, these results should be interpreted with caution due to the small sample size and limited statistical power of the study. How this study might affect research, practice or policy: Future prospective large-scale studies and randomized controlled trials are needed to further examine the role of rivaroxaban and other types of oral anticoagulants in patients with AMI and new-onset AF.</p>","PeriodicalId":20374,"journal":{"name":"Postgraduate Medical Journal","volume":" ","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Postgraduate Medical Journal","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1093/postmj/qgaf163","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
引用次数: 0
Abstract
Background: New-onset atrial fibrillation (AF) in the setting of acute myocardial infarction (AMI) is associated with higher risks of stroke and mortality. However, current guidelines lack specific antithrombotic recommendations for this population. This study aimed to explore the association between rivaroxaban and the prognosis of patients with AMI and new-onset AF.
Methods: This retrospective cohort study included patients with AMI and new-onset AF receiving dual antiplatelet therapy between August 2016 and June 2023 in Tianjin, China. New-onset AF (transient or nontransient) was defined as the first diagnosis of AF following AMI. The primary outcome was stroke.
Results: 2477 patients were identified, including 141 rivaroxaban users and 2336 patients without oral anticoagulants (OAC). Over a median follow-up of 922 days, rivaroxaban users had a 5.7% lower risk of stroke than non-OAC users, although this was not statistically significant (19.9% vs. 25.6%; P = .152). Despite the suggestion of a protective trend, multivariable Cox regression showed that rivaroxaban use was not associated with a lower risk of stroke (hazard ratio, 0.77; 95% confidence interval, 0.52-1.13, P = .187). After propensity score matching, 155 transient (rivaroxaban: 42; non-OAC: 113) and 295 nontransient AF patients (rivaroxaban: 85; non-OAC: 210) were included. No significant association was observed between rivaroxaban and stroke, ischemic stroke, hemorrhagic stroke, all-cause mortality, cardiovascular mortality, bleeding, or major bleeding.
Conclusion: No significant association was observed between rivaroxaban and clinical outcomes in patients with AMI and new-onset AF. Given the small sample size and limited statistical power, the findings are exploratory and require further validation. Key messages What is already known on this topic: Evidence from previous studies indicates that acute myocardial infarction (AMI) patients with new-onset atrial fibrillation (AF) are associated with higher risks of ischemic stroke and mortality. However, the association between rivaroxaban and the prognosis of patients with AMI and new-onset AF remains uncertain. What this study adds: Among patients with AMI and new-onset AF receiving dual antiplatelet therapy, no significant differences were observed between rivaroxaban users and non-oral anticoagulant users in terms of the risks of stroke, ischemic stroke, hemorrhagic stroke, all-cause mortality, cardiovascular mortality, bleeding, or major bleeding. However, these results should be interpreted with caution due to the small sample size and limited statistical power of the study. How this study might affect research, practice or policy: Future prospective large-scale studies and randomized controlled trials are needed to further examine the role of rivaroxaban and other types of oral anticoagulants in patients with AMI and new-onset AF.
期刊介绍:
Postgraduate Medical Journal is a peer reviewed journal published on behalf of the Fellowship of Postgraduate Medicine. The journal aims to support junior doctors and their teachers and contribute to the continuing professional development of all doctors by publishing papers on a wide range of topics relevant to the practicing clinician and teacher. Papers published in PMJ include those that focus on core competencies; that describe current practice and new developments in all branches of medicine; that describe relevance and impact of translational research on clinical practice; that provide background relevant to examinations; and papers on medical education and medical education research. PMJ supports CPD by providing the opportunity for doctors to publish many types of articles including original clinical research; reviews; quality improvement reports; editorials, and correspondence on clinical matters.