Table of Contents
What Is HCM?
HCM (hypertrophic cardiomyopathy) is a disease of the heart muscle. The walls of the heart slowly thicken over time, which makes it harder for the heart to fill with blood and pump properly.
In the early stages, most cats show no symptoms. That is part of what makes HCM so frightening: you may not know anything is wrong.
Signs to watch for:
- Breathing fast or with effort, especially while resting
- Tiring easily or hiding more than usual
- Sudden weakness or trouble walking with the back legs
If you notice any of these, see a vet right away.
How We Work to Reduce the Risk
We use two main screening tools to lower the risk of HCM:
- DNA testing for the known HCM gene in Maine Coons
- Heart ultrasounds (echocardiograms) by a veterinary cardiologist
Even with the best practices, we cannot promise a kitten will never develop HCM. Parents with clear DNA and normal heart scans can still have a kitten that develops HCM later. That is why we screen, track our families' updates and stand behind our kittens.
A Heartbreaking Reminder That HCM Doesn't Play Fair
Write your own story here, or share why heart screening matters so much to you.
What Can You Do to Protect Your Maine Coon's Heart?
Screening with heart ultrasounds
Ask your vet about a baseline heart ultrasound, especially if your cat has a murmur.
Choose quality nutrition
Look for a food high in animal-based protein that meets the nutritional standards for your cat's life stage.
Avoid obesity
Maine Coons grow big, but they should not be fat. Extra weight puts strain on the heart.
Keep them active
Even indoor cats need to move. Use toys, cat trees and daily play sessions.
Supplements
Some owners use supplements such as omega-3 fatty acids or taurine-rich diets. None of these are cures, so always talk to your vet first.
The New Hope: FDA-Approved Medication
In 2025 the U.S. FDA gave conditional approval to the first drug made specifically for cats with subclinical HCM (heart thickening without symptoms). It is a prescription medicine that is not right for every cat, and research is still ongoing.
What owners should know
- It is not for every cat. It is for cats diagnosed with early (subclinical) HCM.
- Your vet decides. Only a vet can say whether it is suitable and how it should be given.
- It is still being studied. Long-term results are still being tracked.
Frequently Asked Questions About HCM in Maine Coons
It depends on how early it is found and how fast it progresses. Some cats live for many years with good veterinary care.
Maine Coons carry a known gene linked to HCM, but HCM can also appear in cats without that gene. That is why breeders use both DNA tests and heart ultrasounds.
There is no cure yet, but medication and monitoring can help many cats live comfortably.
Discover more from Ablues Maine Coon Cattery
Subscribe to get the latest posts sent to your email.