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Heart Defect (Congenital) in Dogs

Patent Ductus Arteriosus in Dogs

The aorta is the main artery that feeds oxygenated blood from the left side of the heart to the body. The pulmonary (lung) artery travels from the right side of the heart to the lungs, carrying deoxygenated blood to be oxygenated. Once the blood has been oxygenated by the lungs, it then returns to the left side of the hearty through the pulmonary veins to be pumped out into the body by the aorta.

In the womb, the fetus’ descending aorta is connected to the pulmonary artery by the ductus arteriosus blood vessel, allowing blood to flow directly from the right side of the heart to the aorta, without stopping for oxygen in the lungs. This is because the fetus gets its oxygen from the mother’s bloodstream and does not yet need to have its own blood oxygenated.

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