disease is the most common heart disease in dogs, it is responsible
for 75% of heart disease in dogs. It is thought to be genetic and
is more common in smaller breeds, especially in Cavalier King
Charles Spaniels where it is the leading cause of death, it can
also effect larger breeds.
Mitral valve disease effects the cardiovascular system. In a healthy animal deoxygenated bloodflows into the heartfrom the vena cava into the right atrium, it then passes through the tricuspid valve into the right ventricle. From here the blood travels through the pulmonary arteryto the lungs where is it oxygenated, next it flows from the lungs to the left atrium via the pulmonary vein. Here it passes through the mitral valve to the left ventricle show more content
The valve is located on the left side of the heart. In a healthy dog the valve will create a tight seal between the left atrium and left ventricle, if the dog has mitral valve disease, also known as leaky valve disorder, the blood leaks back into the left atrium. The first signs of mitral valve disease is a heart murmur, in the early stages of the disease this is the only clinical sign. As the disease advances coughing, increased respiratory rate and fainting. The effected animal will also have an intolerance to exercise and in rare cases the disease can cause sudden death. In advance cause it can also cause symptoms consistent with heart show more content
There is no cure for mitral valve disease, it can only be managed and treatment can change as the disease progresses. The treatment is commonly diuretics, positive inotropes, vasodilators and other medications that help relieve the symptoms of heart failure and regulate blood pressure. Sometimes treatment does not work in severe cases and the dog will die even with treatment. The only way to prevent the disease is to stop the dog from breeding either by neutering the animal or keeping it away from potential
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