A 7 year-old male neutered domestic shorthaired 5 kg cat is currently hospitalized for management of an aortic thromboembolism. The cat was diagnosed with hypertrophic cardiomyopathy, left sided congestive heart failure and aortic thromboembolism causing complete lack of motor function in the pelvic limbs. It is being managed with oxygen therapy provided by commercial oxygen kennel, 2 μg/kg/hr fentanyl infusion, furosemide 2 mg/kg q12 hours and 18.75 mg clopidogrel. The cat is being monitored with regular respiratory rate checks and continuous electrocardiogram (ECG). The cat began to show some improvement in pelvic limb motor function. However, 48 hours post initiation of therapy there was a dramatic change in the ECG (Figure 1).
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