Mews & Views

Mews & Views -- A blog for cat lovers everywhere with a focus on the low-income pet cats of northern and central New Mexico.

Monday, May 19, 2014

Feline Cardiomyopathy -- Death without warning

We've lost two of our geriatric cats over the last 18 months to sudden death – Larry and Joyce.    Both were indoor-only feral cats about 16 years old and neither death came with forewarning.   Joyce’s death was so sudden that we had no chance to get her to a vet for examination – we just woke up one morning and she was gone – we assume it was a heart problem but have no clinical proof of that.

Larry on the other hand started showing signs of distress a few days before he died – he stopped eating and stayed under a bed coming out only to use a litter box.  We knew he was in trouble and took him to the vet for treatment.  And -- since Larry had had a complete physical exam last December -- we went into the appointment knowing that 5 months ago he was in good health for a geriatric cat – no indication of kidney disease, hyperthyroidism or cancer – at least none that were picked up by the exam or lab work.

But by the time Larry reached the clinic he had gone from being an ostensibly healthy cat two days earlier to a terminally ill cat with all his vital signs shutting down – the change was dramatic and alarming.  An x-ray pointed to the culprit – congestive heart failure brought on by cardiomyopathy.  As sad as it sounds, Larry’s unannounced and quick death is not uncommon with this disease – and it is often genetically-based so the average age of death from cardiomyopathy is a young 7 years old – and most of the victims are males.  In its advanced stage, the prognosis is very bad – even with treatment which is more of a “Hail Mary” than a sure thing.    Blood clots often result in the hind legs causing extreme pain and paralysis.

The advance symptoms are minimal if any.  If your cat goes in for annual physical exams and your vet detects a heart murmur that could point to cardiomyopathy which can be confirmed only through further testing by a cardiologist.  But – not all cats with cardiomyopathy have heart murmurs so even with an annual exam it can go undetected until the end stage when the naturally stoic cat can no longer hide the signs of distress.


Simply put, hypertrophic cardiomyopathy (HCM) is a disease of the heart muscle that eventually prevents the heart from pumping properly causing fluid buildup ending in congestive heart failure.    Although the condition develops over time, there are few early signs and since cats are masters at hiding illness it’s hard to pick up on until it’s too late.  To learn more about feline cardiomyopathy visit our web site.

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