Overview: Updated 2025 welfare assessment for aortic thromboembolism in cats, covering pain management and prognosis advances.
Key Welfare Facts
Feline aortic thromboembolism (ATE) causes sudden paralysis and severe pain as a clot obstructs the aorta.
The condition is almost always a complication of underlying hypertrophic cardiomyopathy or other heart disease.
Affected cats present in extreme distress with hindlimb paralysis, cold limbs, and vocalisation from pain.
Aggressive multimodal analgesia is now recognised as the highest immediate welfare priority at presentation.
Prognosis has improved with better supportive care, with 30-40% of well-managed cats surviving the acute event.
Long-term anticoagulant therapy with clopidogrel significantly reduces recurrence risk in recovered cats.
Welfare Assessment
ATE causes extreme acute welfare compromise and requires aggressive pain management as the first priority. Modern management has improved survival rates significantly, but honest prognosis discussion with owners guides compassionate decision-making.
What You Can Do
Seek emergency veterinary care immediately for any cat showing sudden hindlimb weakness or pain
Advocate for immediate multimodal analgesia as the first priority in ATE management
Discuss underlying cardiac disease management and anticoagulation with a cardiologist
Work with your vet to establish quality of life criteria for long-term ATE survivors