SimplyCats Vet Clinic → SimplyCats and Hypertrophic Cardiomyopathy
As most of you will know I am owned by a rescue Sphynx named Piglet. So I’m using the blog to provide some interesting information about the Sphynx breed.
For those of you who have never met a Sphynx before, Piglet will be attending our Cats & Coffee evening on 31st March where we will discuss Feline Hyperthryoidism and Owning a Sphynx. Click here for more information about our ‘Cats & Coffee evening’.
To view photos of Piglet, click here.
The Sphynx is a healthy robust breed but it is thought that around 3% of the breed suffer from this Hypertrophic Cardiomyopathy.
Hypertrophic cardiomyopathy (HCM) affects the heart by thickening the walls of the heart. If you have all read stories of fit young people who have died on the sporting field, often the cause is HCM.
It is possible to contract HCM without a genetic cause, inheriting the disorder is much more likely. If one parent has the genetic trait to pass on HCM, then the chances are 50% of their kittens can develop it.
HCM Screening
Ecardiogram (ECG) is the most reliable way to diagnose HCM. It is currently recommended that Sphynx are screened annually to ensure the cat is not developing HCM.
Symptoms of HCM
Symptoms are often so subtle they go completely unnoticed. A slight rise in respiration rate may be the only visible sign. A vet may detect a heart murmur.
Treatment of HCM
There is currently no cure for HCM, treatment is symptomatic and is often various medications to help with heart failure.
HCM clots can form due to blood circulation in the enlarged heart chambers being abnormal. These clots can then enter the circulatory system and travel to where the blood vessels become too narrow to pass. This will cut off blood flow to the area causing paralysis and pain. This is known as ‘saddle thrombosis’.
Saddle thrombosis prognosis is poor. Some cats survive after mild cases on blood thinning medication, but the underlying cause, HCM will continue to be a major risk factor. Recent studies show that48% of cats that died from saddle thrombosis had HCM.

Claire's cat Piglet
Claire









