A "new" heart murmur (i.e., one not previously present) or an abnormal rhythm requires further investigation in all cats. Approximately 80% of these cats will have hypertrophic cardiomyopathy which is a disease of the heart muscle. However, in the geriatric cat, hyperthyroidism and hypertension must also be ruled out as the underlying cause. The following procedures are recommended to formulate a treatment plan: 1) blood work to evaluate and compare to previous baseline values: 2) chest radiographs to evaluate heart size and lung tissue: 3) blood pressure measurements: and 4) referral to the cardiologist if indicated. Some geriatric cats will present in congestive heart failure where fluid accumulates in the chest or abdomen. This is a medical emergency and may require the immediate transfer to a cardiologist or 24 hour facility.
Feline Hypertrophic Cardiomyopathy
Feline Hypertrophic Cardiomyopathy-Washington State University