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Minimally Invasive Techniques for Correction of Congenital Cardiovascular Defects
Dra. Teresa DeFrancesco
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Minimally invasive catheter delivered occlusion and dilation procedures for the treatment of cardiovascular abnormalities in dogs have evolved from cutting edge innovative techniques to being routinely available at major veterinary cardiovascular centers across USA, Canada, and Europe. This evolution is due in part because of the owner’s desire for less invasive procedures for their beloved pet and due to advances in catheter delivered devices.
PATENT DUCTUS ARTERIOSUS (PDA)
Patent Ductus Arteriosus (PDA) is the most common congenital heart defect in the dog. It occurs when the ductus arteriosus fails to close in the immediate postnatal period. The defect is thought to be inherited and is more common in females. Common breeds affected are Maltese, Toy and Mini Poodles, German Shepherds, and Shelties. Recognition of the defect is typically based on cardiac auscultation, which is notable for usually a loud (typically with a thrill) continuous (systolic and diastolic) machinery murmur heard best over the left heart base. Bounding femoral artery pulses are frequently present. Radiographs demonstrate pulmonary overcirculation, left atrial and ventricular enlargement and a “ductus bump” which is the confluence of the PDA ampulla, dilated aorta and pulmonary artery.(see typical chest radiographs below from a dog with PDA). […]
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About
Affiliation of the authors at the time of publication
North Caroline State University, College of Veterinary Medicine, Raleigh, NC 27606 USA
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