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Published on: February 28, 2012
Comparative outcomes of direct oral anticoagulants versus warfarin in patients with atrial fibrillation and liver
Faizan Ahmed1, Saifullah Khan2, Najam Gohar3
1Jersey Shore University Medical Center, Neptune, NJ, USA.
Insights
Direct oral anticoagulants (DOACs) show reduced hepatic decompensation and mortality in atrial fibrillation (AF) patients with cirrhosis compared to warfarin. However, ischemic stroke risk remains similar, warranting further investigation into DOACs for this population.
Area of Science:
- Cardiology
- Hepatology
- Pharmacology
Background:
- Anticoagulation in atrial fibrillation (AF) patients with liver cirrhosis presents a complex balance between thrombosis and bleeding risks.
- Direct oral anticoagulants (DOACs) are alternatives to warfarin, but their safety and efficacy in cirrhosis are not fully established.
Purpose of the Study:
- To compare the safety and effectiveness of DOACs versus warfarin in patients with AF and liver cirrhosis.
- To evaluate risks of hepatic decompensation, ischemic stroke, mortality, and bleeding events.
Main Methods:
- Retrospective cohort study using the TriNetX Global Collaborative Network.
- Included adult patients (≥18 years) with AF and cirrhosis on DOACs or warfarin.
- Propensity score matching (1:1) was used to balance baseline characteristics, followed by 1-year outcome analysis.
Main Results:
- DOAC use was associated with significantly lower risks of hepatic decompensation (HR 0.79) and all-cause mortality (HR 0.87) compared to warfarin.
- No statistically significant differences were found in ischemic stroke, major bleeding, intracranial hemorrhage, gastrointestinal bleeding, or all-cause hospitalization.
- The study included 2,522 matched pairs (5,044 patients) with 1-year follow-up.
Conclusions:
- DOACs may offer a safer alternative to warfarin in AF patients with cirrhosis, reducing hepatic decompensation and mortality.
- While DOACs did not show increased risks in major bleeding or stroke, their effectiveness in preventing ischemic stroke requires further study.
- Findings are associative and hypothesis-generating due to the observational nature of the study.
Abstract:
Anticoagulation in patients with atrial fibrillation (AF) and liver cirrhosis is challenging due to competing risks of thrombosis and bleeding. While direct oral anticoagulants (DOACs) have emerged as alternatives to warfarin, their comparative safety and effectiveness in cirrhosis remain incompletely defined. We conducted a retrospective cohort study using the TriNetX Global Collaborative Network. Adult patients (≥ 18 years) with AF and cirrhosis receiving DOACs or warfarin were identified. Propensity score matching (1:1) was performed to balance baseline characteristics. The primary outcomes were hepatic decompensation and ischemic stroke within 1 year. Secondary outcomes included all-cause mortality, major bleeding, intracranial hemorrhage, gastrointestinal bleeding, and all-cause hospitalization. Survival (Kaplan-Meier) analysis and hazard ratios were estimated. After propensity score matching, 2,522 matched pairs (5,044 patients) were included. Over 1-year follow-up, hepatic decompensation occurred in 8.8% of DOAC patients and 11.1% of warfarin patients, with a significantly lower risk observed in the DOAC group (HR 0.79, 95% CI 0.67-0.95; p = 0.010). Ischemic stroke occurred in 2.9% of DOAC patients and 2.4% of warfarin patients, with no statistically significant difference between groups (HR 1.22, 95% CI 0.85-1.75; p = 0.289). All-cause mortality was lower in the DOAC group (17.7% vs. 20.3%; HR 0.87, 95% CI 0.77-0.99; p = 0.035). No significant differences were observed in major bleeding (HR 0.84, 95% CI 0.70-1.02), intracranial hemorrhage (HR 0.98, 95% CI 0.59-1.62), gastrointestinal bleeding (HR 0.97, 95% CI 0.77-1.23), or all-cause hospitalization (HR 1.04, 95% CI 0.97-1.12). In patients with atrial fibrillation and cirrhosis, DOAC use was associated with lower risks of hepatic decompensation and all-cause mortality compared with warfarin, while no significant difference was observed in ischemic stroke or other safety outcomes. Given the observational design and modest absolute differences, these findings should be interpreted as associative and hypothesis-generating rather than causal or definitive.
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