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Outcomes associated with dual antiplatelet therapy after myocardial infarction in patients with aortic stenosis

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Vis graf over relationer

BACKGROUND: Acquired loss of the largest von Willebrand factor multimers is a common hemostatic disturbance in patients with aortic valve stenosis (AS), resulting in impaired platelet adhesion and increased bleeding risk. AS is also associated with atherosclerosis and myocardial infarction (MI). Our aim was to study the clinical outcomes associated with AS in MI patients treated with dual antiplatelet therapy (DAPT) in a nationwide hospital-based register study.

METHODS: Based on nationwide hospital discharge registers from Sweden (2005-2010) and Denmark (2005-2015), we calculated 1-year incidence rates and hazard ratios of bleeding, recurrent MI, and all-cause mortality in MI patients with and without AS treated with DAPT. Results from both countries were also combined in a meta-analysis.

RESULTS: We included 50,460 MI patients from Sweden and 50,307 MI patients from Denmark, of which 3% had AS. The bleeding rates (per 100 person-years) in Sweden and Denmark were 3.2 and 3.3 among patients without AS vs. 9.2 and 8.3 among patients with AS. All-cause mortality rates were 7.1 vs. 28.7 in Sweden and 5.8 vs. 30.7 in Denmark among patients without and with AS, respectively. Patients with AS had an increased risk of bleeding, recurrent MI and all-cause mortality. Combined results from both countries were similar for bleeding (hazard ratio 1.59 [0.98-2.59]), recurrent MI (1.78 [1.25-2.54]), and all-cause mortality (1.76 [1.26-2.47]).

CONCLUSION: AS was associated with an increased risk of bleeding, recurrent MI and mortality after MI when treated with DAPT. Individualized selection of antiplatelet therapy may be warranted in this high-risk population.

OriginalsprogEngelsk
TidsskriftInternational Journal of Cardiology
Vol/bind281
Sider (fra-til)140-145
Antal sider6
ISSN0167-5273
DOI
StatusUdgivet - 15 apr. 2019

Bibliografisk note

Copyright © 2019 Elsevier B.V. All rights reserved.

ID: 56963063