![]() Mitral valve insufficiency (leaky valve disease). Congenital heart disease is rare, accounting for about 5% of all canine heart disease.Ĭommon congenital heart diseases include: Some dogs are born with congenital heart defects that contribute to this condition, but they can take years to present themselves. There are a number of factors that can result in CHF. What causes Congestive Heart Failure in dogs? This arises when both the right and left ventricles are not working properly. Fluid may also leak from veins in the limbs and cause swelling, a condition known as peripheral edema. This can cause fluid buildup in the abdomen, a condition called ascites. Pressure builds up in the vessels that deliver blood to the right atrium, and the body’s veins and capillaries. If the right side of the heart is weak or there is a dysfunctional valve, the heart is unable to pump enough blood to the lungs for oxygenation. They often breathe faster than healthy dogs. On occasion, dogs with left-sided CHF faint due to lack of blood flow and oxygen to the brain. As a result, fluid accumulates within the lungs (a condition known as pulmonary edema). Certain signs such as coughing, difficulty breathing, and exercise intolerance are indicative of a backup of pressure in the vessels delivering blood to the left atrium (upper chamber) and ventricle (lower chamber). The left side of the heart collects oxygen-rich blood and pumps it out to the body’s various organs. This is the most common type of CHF in dogs. What is the difference between right-sided and left-sided CHF? Left-sided congestive heart failure ![]()
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