Feline Aortic Thromboembolism: Welfare Emergency

Key Welfare Considerations

• ATE occurs when a cardiac thrombus embolises to the aortic trifurcation, causing acute hindlimb ischaemia.
• Clinical signs are dramatic — acute welfare crisis with paralysis, cold limbs, vocalisaton of pain, and cyanotic pads.
• Hypertrophic cardiomyopathy (HCM) is the most common underlying cause — regular cardiac screening may detect risk.
• Pain is severe and immediate — welfare analgesic therapy is the first priority in ATE management.
• Opioid analgesia (buprenorphine, methadone) is welfare-mandatory as the first intervention.
• Prognosis is guarded to poor — approximately 40-50% of cats die or are euthanased during acute welfare management.
• Cats with hypothermia, severe acid-base disturbance, or pre-existing severe heart disease have poorer welfare prognosis.
• Aspirin historically used for anticoagulation — clopidogrel provides superior welfare protection from recurrence.
• Thrombolytics including streptokinase have high complication rates — welfare benefit versus risk is debated.
• Supportive welfare care includes warming, fluid therapy, and monitoring for reperfusion syndrome.
• Reperfusion injury as circulation returns can cause life-threatening welfare metabolic complications.
• Cats that survive ATE acute phase can regain limb function over days to weeks — welfare recovery is possible.
• Long-term clopidogrel therapy reduces recurrence welfare risk in ATE survivors with ongoing cardiac disease.
• Cardiac welfare management with atenolol or diltiazem addresses underlying HCM progression.
• Quality of life welfare assessment after ATE must consider both cardiac status and mobility outcomes.