What is mitral valve disease? It is a heart condition where the mitral valve (the valve on the left side of the heart) fails to function properly. Who are most commonly affected? Studies show that this disease are common in adult dogs or older dogs that are small to medium sized breeds. High prevalence of the disease were found in King Charles spaniel, Chihuahua, miniature poodle, miniature pinscher, terriers and miniature schnauzers. What causes mitral valve disease in dogs? This condition is caused by the accumulation of plaque in a dog's heart valve. Because the mitral valve is unable to function properly, blood is leaked back to the atrium (upper chamber) of the heart. As a result, the heart tries to pump harder to deliver blood to the atrium which can lead to congestive heart failure. What are the symptoms of this condition? Symptoms may not be obvious right away but as the condition worsens, a dog with this condition may have difficulty breathing and may exper...
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