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Walk the evidence base by book and chapter — the raw source passages that ground Ask, Differential, and the rest.
1 passage
The association of direct thrombin inhibitor anticoagulants with cardiac thromboses. Direct thrombin inhibitor (anti-factor IIa) anticoagulants, now established for treatment and prevention of cardiac thromboembolism and VTE, have been repeatedly associated with a significantly increased frequency of thrombosis on abnormal cardiac endothelium when compared head-to-head with indirectly acting therapeutic anticoagulants in studies of sufficient patient number and duration. Although there is uncertainty as to the mechanism, the weight of evidence as a class effect warrants prescribing effective anticoagulants other than direct thrombin inhibitors.