Thromboembolism and bleeding in patients with atrial fibrillation and liver disease - a nationwide register-based cohort study: Thromboembolism and bleeding in liver disease

Kamilla Steensig, Manan Pareek, Anne Lund Krarup, Peter Sogaard, Michael Maeng, Bhupendar Tayal, Christina Ji-Young Lee, Christian Torp-Pedersen, Gregory Yh Lip, Peter Holland-Fischer, Kristian Hay Kragholm

Abstract

BACKGROUND: Balancing the risk of thromboembolism and bleeding in patients with liver disease and atrial fibrillation/flutter is particularly challenging.

PURPOSE: To examine the risks of thromboembolism and bleeding with use/non-use of oral anticoagulation (including vitamin K-antagonists and direct oral anticoagulants) in patients with liver disease and AF.

METHODS: Danish nationwide register-based cohort study of anticoagulant naive individuals with liver disease, incident atrial fibrillation/flutter, and a CHA2DS2-VASc-score≥1 (men) or ≥2 (women), alive 30 days after atrial fibrillation/flutter diagnosis. Thromboembolism was a composite of ischaemic stroke, transient ischaemic attack, or venous thromboembolism. Bleeding was a composite of gastrointestinal, intracerebral, or urogenital bleeding requiring hospitalisation, or epistaxis requiring emergency department visit or hospital admission. Cause-specific Cox-regression was used to estimate absolute risks and average risk ratios standardised to covariate distributions. Because of significant interactions with anticoagulants, results for thromboembolism were stratified for CHA2DS2-VASc-score, and results for bleeding were stratified for cirrhotic/non-cirrhotic liver disease.

RESULTS: Four hundred and nine of 1,238 patients with liver disease and new atrial fibrillation/flutter initiated anticoagulants. Amongst patients with a CHA2DS2-VASc-score of 1-2 (2-3 for women), five-year thromboembolism incidence rates were low and similar in the anticoagulant (6.5%) versus no anticoagulant (5.5%) groups (average risk ratio 1.19 [95%CI, 0.22-2.16]). In patients with a CHA2DS2-VASc-score>2 (>3 for women), incidence rates were 16% versus 24% (average risk ratio 0.66 [95%CI, 0.45-0.87]). Bleeding risks appeared higher amongst patients with cirrhotic versus non-cirrhotic disease but were not significantly affected by anticoagulant status.

CONCLUSION: Oral anticoagulant initiation in patients with liver disease, incident new atrial fibrillation/flutter, and a high CHA2DS2-VASc-score was associated with a reduced thromboembolism risk. Bleeding risk was not increased with anticoagulation, irrespective of the type of liver disease.

OriginalsprogEngelsk
Artikelnummer101952
TidsskriftClinics and Research in Hepatology and Gastroenterology
Vol/bind46
Udgave nummer8
Sider (fra-til)101952
ISSN2210-7401
DOI
StatusUdgivet - okt. 2022

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