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Sphynx Cats and HCM (Hypertrophic Cardiomyopathy)

What is Feline HCM (Hypertrophic Cardiomyopathy)?

HCM is a disease that causes a thickening of the heart muscle, and is believed to be largely genetic in origin, with several breeds considered suspect including the Sphynx and is still under study. Although there is no known cure for this condition, with prompt diagnosis and early treatment, Sphynx cats may live on for years after they are diagnosed. Congestive Heart Failure (CHF) results from HCM. Do not be mislead by certain sites and articles that unfortunately leave new Sphynx owners in a panic frenzy to begin making phone calls to their vet and setting up appointments for their Sphynx cat to schedule an X-Ray, ECG (Electrocardiogram) or an Echo because they read of this horrible “Sphynx cat disease” on the internet that everyone is talking about. “YES,” it is a horrible disease and “NO,” it’s not only a “Sphynx cat disease!”. HCM is a disease that affects animals like cats, dogs, hamsters, rabbits and even humans can be diagnosed with HCM. There is no “guarantee” that any animal including Sphynx cats will or will not contract this disease so do not let any one tell you different. For instance, two breeding Sphynx parents can live full healthy lives with no symptoms of HCM, scanned yearly HCM free but one of their kittens can be diagnosed 2 years down the road into its life. So if HCM is something that bothers you, or keeps you up at night, then by all means see your vet, get your regular check up and ask his opinion on the matter and go from there. What I will tell you is most vets, unless your Sphynx cat shows symptoms of HCM, will not explore any further then a simple check up and send you on your way.

How is Feline Hypertrophic Cardiomyopathy Treated?

The Treatment for HCM will depend on the progression of the disease in the Sphynx cat, and includes:

Beta Blockers: atenolol and metoprolol
These drugs help improve the “filling” function of the left ventricle, which will subsequently increase the volume of blood flowing to the lungs, helping to decrease pulmonary edema.

Calcium Channel Blockers : diltiazem
Also help improve heart function, by reducing heart rate and myocardial oxygen consumption.

ACE Inhibitors:enalapril or benazepril
Ongoing clinical trials with cats seem to indicate that these drugs may work better than Beta Blockers, for improving heart function.

Diuretics: Help to reduce pulmonary edema. Because of the potential for negative side effects. Renal function must be monitored carefully when diuretics are used.
Treat underlying conditions
Most often Hyperthyroidism and/or hypertension (high blood pressure).

How Long Can my Sphynx Cat Live with HCM?

Every Sphynx cat will carry their own history of the disease, and it is impossible to predict the prognosis of any Sphynx cat with HCM. However, existing technology offers great possibility of several more months to several years, and depending on the overall condition of your cat at diagnosis. A dedicated Sphynx owner can help by working closely with their vet, and by providing a warm, stress-free environment for their Sphynx companion and their Sphynx could have a long and enjoyable life with their human.

Disclaimer: I am not a vet. This article is just my opinion, as always refer to your vet for proper diagnosis and treatment of any feline disease.

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About the Author

Tom Kohr-Founder of Sphynxlair-Sphynx Cat Community, The worlds best information center for sphynx cat lovers. It’s a great place for entertainment where you can get answers about the Sphynx cat, recommendations and advice. Share photos and videos. Keep a diary, join groups of like-minded Sphynx lovers and just have a ball!

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Hypertrophic Cardiomyopathy – SAM – Cat