by Kate Steinhacker, DVM, CVA, CVCH, CVTP, CVFT, Portland, ME
On Mar 5th, 2009, a 14-year-old tortoise shell indoor-outdoor domestic short hair cat had presented excessively vocal, somewhat inappetant, underweight with full body muscular atrophy, and tachycardic with a new III/VI left systolic heart murmur. Normally a fastidious groomer, the patient had ceased self-care. Bloodwork had been run [T4 5.1 ug/dL (0.8-4.0)], and a diagnosis of hyperthyroidism had been made. She had been started on methimazole 2.5 mg BID for the first month, with an increase to 5.0 mg BID for the past 2 months.