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Mitral valve disease is often one of the earliest indicators of heart disease that could lead to heart failure. It is more common in small dogs than large breeds. This handout discusses mitral valve disease in dogs, a degeneration of the valve between the left atrium and left ventricle. The clinical signs, diagnosis, treatment, and the prognosis of this condition are outlined.
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Atrioventricular (AV) valve dysplasia is a developmental malformation of the mitral or tricuspid valve in the heart. Signs include exercise intolerance, accumulation of fluid in the abdomen, weight loss, and stunted growth. Difficulty breathing or collapse may occur if congestive heart failure develops. Treatment of AV valve dysplasia is focused on managing signs of congestive heart failure and/or disturbances in heart rhythm, generally using medications.
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Atrioventricular (AV) valve dysplasia is a developmental malformation of the mitral or tricuspid valve in the heart. Signs include exercise intolerance, accumulation of fluid in the abdomen, weight loss, and stunted growth. Difficulty breathing or collapse may occur if congestive heart failure develops. Treatment of AV valve dysplasia is focused on managing signs of congestive heart failure and/or disturbances in heart rhythm, generally using medications.
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This handout summarizes the normal function of the dog heart, and outlines the abnormalities and changes associated with degeneration of the four different valves found in the heart. An explanation is provided of clinical signs associated with valve disease, as well as the recommended tests and treatments for this condition. Staging of heart disease is also discussed.
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Endocarditis is an infection of a heart valve, most often affecting the mitral or aortic valve. It can arise any time that bacteria enter the bloodstream, though it is more common when the heart valve has already been damaged for some other reason. This handout discusses the causes, clinical signs, diagnosis, treatment, and prognosis of this condition.
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Endocarditis is an infection of a heart valve, most often affecting the mitral or aortic valve. It can arise any time that bacteria enter the bloodstream, though it is more common when the heart valve has already been damaged for some other reason. The clinical signs of endocarditis are often nonspecific in the early stages, but may progress to include signs of heart failure later in the course of the disease. The diagnosis and treatment of endocarditis can present a challenge, requiring multiple tests and prolonged courses of antibiotic therapy.
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Congestive heart failure (CHF) refers to the heart's inability to pump adequate blood to the body. There are many causes of CHF in dogs. The two most common causes are mitral valve insufficiency (MVI), or a leaky mitral valve, and dilated cardiomyopathy (DCM). The most common clinical sign of CHF is persistent coughing accompanied by difficulty breathing. Other signs include coughing when at rest or sleeping, an increased resting respiratory rate or excessive panting, persistent loss of appetite, a swollen belly, and pale or bluish gums.
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This handout discusses what a heart murmur is, how it is diagnosed, what recommended tests are advised to determine the underlying cause, and potential treatments or monitoring that should be undertaken when a murmur is detected in your dog.
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Heart disease is more common in dogs than in cats. It can be due to congenital defects or adult-onset disease. The two most common types of adult heart disease are mitral regurgitation (valve disease) and dilated cardiomyopathy or DCM (heart muscle disease). Diagnosis involves X-rays, ECG, and echocardiography. Treatment depends on the cause of heart disease.
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Aortic stenosis (or a narrowing involving the aortic valve) is a less common heart disease that has a higher incidence in some breeds. Dogs may not show clinical signs if they are mildly affected to more severely affected patients showing signs of heart dysfunction. Diagnostic imaging is needed to determine the severity and prognosis for each individual patient. Medications are the mainstay treatment but for some patients surgical procedures may be considered.