Companion Animals

Feline Aortic Thromboembolism: Welfare and Emergency Management

Managing saddle thrombus in cats — one of the most acute welfare emergencies in feline medicine.

Key Facts

FATE causes acute rear limb paralysis from blood clot blocking the aortic trifurcation
Affected cats vocalize in extreme pain and cannot move their hind legs
Most cases are associated with underlying hypertrophic cardiomyopathy
Early euthanasia or emergency thrombolysis — decisions must be made rapidly

Welfare Considerations

FATE causes extreme acute suffering — sudden paralysis and intense pain in both limbs constitute one of the most severe welfare emergencies in veterinary medicine. Welfare decision-making must be rapid — thrombolysis can restore circulation but carries risks; supportive care alone leaves cats in pain for days; euthanasia is appropriate when prognosis is poor and suffering is severe. Honest prognostic communication is essential.

What You Can Do

If your cat suddenly loses use of hind legs and is vocalising in pain — this is an emergency
Discuss prognosis honestly with your vet — survival rates vary and long-term cardiac management is required
Screen cats with HCM for thrombus risk and discuss preventive anticoagulation with your vet