Treatment of Two Major Complications (Intracranial Hemorrhage and Thrombosis) Associated with Oral Anticoagulant Therapy and Management of Their Coincidence

Q: What is the clinical evidence from this study?

Study design: Review. Population: Intracranial hemorrhage and prosthetic valve thrombosis associated with oral anticoagulant therapy (warfarin). Intervention: Oral anticoagulant therapy reversal (fresh-frozen plasma, prothrombin complex concentrate, vitamin K, rFVIIa) and subsequent anticoagulation management (heparin bridging, warfarin resumption).

Q: What does this research mean for the field?

Warfarin-associated intracranial hemorrhage carries a mortality exceeding 50%, requiring rapid anticoagulation reversal followed by cautious heparin bridging and oral anticoagulation resumption at 1–2 weeks in patients with mechanical prosthetic valves. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

Naomi Nakagawa

doi:10.9794/jspccs.32.9

January 1, 2016Japanese Society of Pediatric Cardiology and Cardiac SurgeryOpen Access

Treatment of Two Major Complications (Intracranial Hemorrhage and Thrombosis) Associated with Oral Anticoagulant Therapy and Management of Their Coincidence

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Structured PICO

P

Population

Adult and pediatric patients receiving oral anticoagulant therapy (warfarin), particularly those with mechanical prosthetic heart valves, congenital heart disease (e.g., Fontan circulation, truncus arteriosus), or Kawasaki disease giant coronary aneurysms who develop intracranial hemorrhage (ICH), prosthetic valve thrombosis, or both (includes an illustrative case report of a 15-month-old male with truncus arteriosus and a mechanical aortic valve).

I

Intervention

Urgent warfarin reversal using vitamin K, fresh-frozen plasma (FFP; 15-30 mL/kg), prothrombin complex concentrates (PCC; 20-50 IU/kg or 500 units in adults), or recombinant activated factor VII (rFVIIa; 10-50 µg/kg), followed by early heparin bridging after hemostasis and warfarin resumption after 1-2 weeks; surgical valve replacement vs. thrombolytic therapy for prosthetic valve thrombosis.

O

Outcome

Hematoma expansion, mortality (which exceeds 50% in OAT-associated ICH), thromboembolic events, and prosthetic valve thrombosis resolution.

Limitations

Limited clinical data and small sample sizes regarding warfarin-associated intracranial hemorrhage in pediatric patients
Lack of randomized controlled trials comparing surgical intervention versus thrombolytic therapy for left-sided mechanical prosthetic valve thrombosis
Off-label status in Japan for prothrombin complex concentrates, recombinant activated factor VII, and low-molecular-weight heparin for these indications
Data on pediatric warfarin-associated intracranial hemorrhage are limited to 1-2 cases per report, making it difficult to identify prognostic factors in children.
No randomized trials have compared surgical intervention and thrombolytic therapy for left-sided mechanical prosthetic valve thrombosis.
In Japan, prothrombin complex concentrates, recombinant factor VIIa, and low-molecular-weight heparin are off-label for OAT-associated ICH reversal or mechanical valve bridging.

Implication

This review outlines practical management strategies for balancing urgent anticoagulation reversal and thromboembolism prevention in adult and pediatric patients experiencing warfarin-associated intracranial hemorrhage and mechanical prosthetic valve thrombosis.

Abstract

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Cite This Study

Naomi Nakagawa (2016) conducted a review in Intracranial hemorrhage and prosthetic valve thrombosis associated with oral anticoagulant therapy (warfarin). Oral anticoagulant therapy reversal (fresh-frozen plasma, prothrombin complex concentrate, vitamin K, rFVIIa) and subsequent anticoagulation management (heparin bridging, warfarin resumption) was evaluated.

synapsesocial.com/papers/6a706fece5469ee92be12baa https://doi.org/10.9794/jspccs.32.9

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Treatment of Two Major Complications (Intracranial Hemorrhage and Thrombosis) Associated with Oral Anticoagulant Therapy and Management of Their Coincidence

Structured PICO

Limitations

Implication

Abstract

Discussion

Cite This Study

Treatment of Two Major Complications (Intracranial Hemorrhage and Thrombosis) Associated with Oral Anticoagulant Therapy and Management of Their Coincidence

Structured PICO

Limitations

Implication

Abstract

Discussion

Cite This Study

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