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What can cause a heart murmur in adult cats beside hyperthyroidism?
jselleck posted:
I have an adult male cat Jack who's between 12 and 13 years old ( He's a rescued stray so we don't know his exact age.) Four days ago took him to our vet who told us he had a heart murmur and possible hyperthyroidism. They did blood work, the results of which we got yesterday. No problem with the thyroid, now they want to do an ultrasound which we can't really afford thanks to money issues. So my question both to the vet and anyone else who may know about this, what else can cause a murmur??? Any help/advise would be appreciated. Thanks.

jselleck responded:
Drew Weigner, DVM, ABVP responded:
A heart murmur is caused by turbulence as the blood flows through the heart. It can be caused by anything that causes turbulence such as fevers, anemia, hypertension, thyroid disease, etc. So it doesn't necessarily mean your cat has a heart problem, but if all his lab tests were normal, then it's a strong possibility. The issue is that, if he has a heart problem, it's very important to find out before he shows symptoms because once he does, it's often rapidly fatal. Your veterinarian is making a sound recommendation.

Drew Weigner, DVM, ABVP
The Cat Doctor
Board Certified in Feline Practice


William Draper, DVM, better known as "Dr. Will," is a well-known small animal practitioner in the Atlanta, GA area. He grew up in Inglewood,...More

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