Heart Murmur in Adult Cats
In adult cats, a heart murmur is often only detected later in life. This may be due to an age-related condition or a disease that affects blood circulation. A heart murmur in an adult cat typically requires further investigation, such as an ultrasound or blood test, to determine the underlying cause.
What Causes a Heart Murmur in Cats?
A heart murmur can have various causes. Some cats have a murmur without any serious heart abnormalities, while in other cases, it may be a symptom of an underlying medical condition.
Heart Murmur Without Structural Heart Disease (Innocent Murmur)
Sometimes, a heart murmur in cats is harmless and caused by factors unrelated to actual heart disease:
- Dynamic Right Ventricular Outflow Tract Obstruction (DR VOTO): This is a benign type of murmur seen in young cats, which often resolves on its own.
- Anaemia: A low red blood cell count can affect blood flow and lead to a heart murmur.
- Thyroid Issues: An overactive thyroid (hyperthyroidism) can cause the heart to beat faster, which may result in a murmur.
Heart Murmur Due to High Blood Pressure
High blood pressure (hypertension) can disrupt blood circulation and lead to a murmur. This is commonly seen in older cats and may be associated with other conditions such as kidney disease or thyroid disorders.
Heart Murmur Caused by HCM (Hypertrophic Cardiomyopathy)
Hypertrophic cardiomyopathy (HCM) is the most common heart disease in cats. It causes the heart muscle to thicken, reducing the heart’s pumping efficiency. This can lead to a heart murmur, breathing difficulties, and even heart failure. HCM is a serious condition that can be diagnosed using a cardiac ultrasound (echocardiogram).
How to Recognise a Heart Murmur in Your Cat
In many cases, a cat owner won’t notice any signs of a heart murmur, especially if it’s innocent. However, in more serious cases, the following symptoms may occur:
- Rapid or laboured breathing
- Fatigue or reduced activity
- Fainting or weaknes
- Weight loss
- Blue or pale gums and mucous membranes
- If your cat shows any of these symptoms, it is important to contact your vet promptly.
How Is a Heart Murmur Treated in Cats?
The treatment of a heart murmur depends on the underlying cause. If the murmur is innocent, no treatment is usually needed. However, in conditions such as HCM or high blood pressure, medication may be required to support heart function and control blood pressure.
In addition, nutrition and supplements can play an important role in supporting heart health:
- Phytonics Cardio Compositum: A natural supplement that supports heart function and helps maintain healthy circulation.
- Canina Hart Vitaal: This supplement contains essential nutrients like taurine and L-carnitine, which are vital for a healthy heart.
Specialised diets, such as food with a reduced sodium content, can also contribute to improved heart health. Always consult your vet to determine the most suitable diet for your cat.
What Is the Prognosis for a Heart Murmur in Cats?
The prognosis for a heart murmur in cats can vary greatly depending on the underlying cause. Innocent murmurs in kittens often disappear on their own, while murmurs caused by HCM or high blood pressure may require lifelong treatment. However, with proper care and medication, many cats with a heart murmur can still enjoy a good quality of life.
Do you have any questions about heart murmurs in cats? Feel free to contact us at [email protected].
