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Heart diseases in dogs

My dog has a strange cough and fatigues easily

It is estimated that a little over 10% of all pets have some form of heart disease. There are many different reasons for the presence of heart disease – from genetics to poor diet, ageing, illness/infection and obesity – but what is common among all types of heart disease is that the condition does not simply go away on its own. It is usually progressive and, depending on how severe the symptoms are and when the dog is diagnosed with the disease, it can eventually lead to heart failure.



Heart diseases in cats

My cat seems to have breathing difficulty and is lethargic

The American Veterinary Medical Association suggests that one in 10 cats across the globe is either born with or develops some form of heart disease in their lifetime. There are a number of different types of heart disease in felines, but all of them present with some kind of abnormal structure or function of the heart’s chambers, valves or surrounding muscle.



Dilated cardiomyopathy (DCM) in dogs and cats

My pet tires quickly when playing or exercising and sometimes has a soft cough like trying to clear their throat

What is dilated cardiomyopathy?

Cardiomyopathy is a disease condition of the heart muscle that inhibits its ability to function properly. In the case of dilated cardiomyopathy (DCM), the heart muscle is stretched and the muscle is thin and flabby, affecting its pumping ability. Dilated cardiomyopathy can affect both pets and people.

The heart is designed as a pump where each contraction pushes blood from the lungs to the rest of the body and back again. This allows the oxygen we breathe in to be absorbed in the blood and distributed to where it is needed. When the pump itself is affected, the distribution and flow of blood is compromised. In DCM, the bottom chambers of the heart, which are the power house for the pumping action, are dilated and thin, and unable to properly expel the blood presented to them from the lungs and body. This leads to a backup behind the heart. Depending on which side of the heart is more severely affected, this usually ends up with fluid and blood buildup in the lungs. In DCM, it is usually all four chambers of the heart that are stretched and affected, not just one side. This stretching of the muscle also affects the electrical conduction of the heart and its ability to pump at a normal rhythm.