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1.
Rev. cient. eletrônica med. vet ; 25: 1-16, jul. 2015.
Article in Portuguese | VETINDEX | ID: biblio-1494201

ABSTRACT

A Persistência do Ducto Arterioso (PDA) é uma das anomalias cardiovasculares congênitas mais comuns em cães. A permanência do ducto por mais de alguns dias após o nascimento caracteriza a PDA. Na PDA com fluxo da aorta para a artéria pulmonar ocorre um desvio de sangue de forma contínua da esquerda para a direita, resultando em sobrecarga de volume e dilatação do átrio e ventrículo esquerdos, levando à insuficiência cardíaca congestiva esquerda, o que pode resultar em hipertensão pulmonar capaz de reverter a direção do fluxo sanguíneo através do ducto, causando a PDA com fluxo da artéria pulmonar para a aorta. O tratamento medicamentoso não é curativo e a correção cirúrgica é recomendada em todos os casos de PDA com desvio da esquerda para a direita em animais com menos de 2 anos de idade ou com mínimos riscos anestésicos. Em animais com PDA com desvio da direita para a esquerda, o tratamento cirúrgico é contraindicado, pois o ducto funciona como uma valva de escape para as altas pressões encontradas no lado direito.


The Patent Ductus Arteriosus (PDA) is one of the most common congenital cardiovascular anomalies in dogs. The permanence of the ductus by more than a few days after birth characterized PDA. In the PDA whit flow from the aorta to the pulmonary artery blood deviation continuously from left to right occurs, resulting in fluid overload and dilation of the ventricle and atrium left, causing left congestive heart failure. The increased blood flow in dogs with PDA from the aorta to the pulmonary artery can result in pulmonary hypertension capable of reversing the direction of blood flow through the ductus, causing PDA with flow from the pulmonary artery to the aorta. Drug treatment is not curative and surgical correction is recommended in all cases of PDA with flow from left to right in animals under 2 years of age or minimum anesthetic risks. In animals with PDA with a flow from right to left, surgery is not recommended, because the ductus operates as an exhaust valve to the high pressures found at the right side.


Subject(s)
Animals , Dogs , Ductus Arteriosus, Patent/therapy , Ductus Arteriosus, Patent/veterinary , Heart Defects, Congenital/veterinary
2.
R. cient. eletr. Med. Vet. ; 25: 1-16, jul. 2015.
Article in Portuguese | VETINDEX | ID: vti-691019

ABSTRACT

A Persistência do Ducto Arterioso (PDA) é uma das anomalias cardiovasculares congênitas mais comuns em cães. A permanência do ducto por mais de alguns dias após o nascimento caracteriza a PDA. Na PDA com fluxo da aorta para a artéria pulmonar ocorre um desvio de sangue de forma contínua da esquerda para a direita, resultando em sobrecarga de volume e dilatação do átrio e ventrículo esquerdos, levando à insuficiência cardíaca congestiva esquerda, o que pode resultar em hipertensão pulmonar capaz de reverter a direção do fluxo sanguíneo através do ducto, causando a PDA com fluxo da artéria pulmonar para a aorta. O tratamento medicamentoso não é curativo e a correção cirúrgica é recomendada em todos os casos de PDA com desvio da esquerda para a direita em animais com menos de 2 anos de idade ou com mínimos riscos anestésicos. Em animais com PDA com desvio da direita para a esquerda, o tratamento cirúrgico é contraindicado, pois o ducto funciona como uma valva de escape para as altas pressões encontradas no lado direito. (AU)


The Patent Ductus Arteriosus (PDA) is one of the most common congenital cardiovascular anomalies in dogs. The permanence of the ductus by more than a few days after birth characterized PDA. In the PDA whit flow from the aorta to the pulmonary artery blood deviation continuously from left to right occurs, resulting in fluid overload and dilation of the ventricle and atrium left, causing left congestive heart failure. The increased blood flow in dogs with PDA from the aorta to the pulmonary artery can result in pulmonary hypertension capable of reversing the direction of blood flow through the ductus, causing PDA with flow from the pulmonary artery to the aorta. Drug treatment is not curative and surgical correction is recommended in all cases of PDA with flow from left to right in animals under 2 years of age or minimum anesthetic risks. In animals with PDA with a flow from right to left, surgery is not recommended, because the ductus operates as an exhaust valve to the high pressures found at the right side. (AU)


Subject(s)
Animals , Dogs , Ductus Arteriosus, Patent/veterinary , Ductus Arteriosus, Patent/therapy , Heart Defects, Congenital/veterinary
3.
Vet Pathol ; 45(4): 542-5, 2008 Jul.
Article in English | MEDLINE | ID: mdl-18587103

ABSTRACT

Two cases of patent ductus arteriosus are described in 2 Murrah buffalos, a 7.5-month-old heifer calf and a 5-month-old bull calf. The main clinical signs consisted of exercise intolerance, dyspnea, and tachycardia. At necropsy, lesions were consistent with congestive heart failure as indicated by dependent subcutaneous edema, body cavity effusions, and nutmeg liver. The lungs were extensively atelectatic. The heart was enlarged and had a globous shape. The ductus arteriosus, measuring 0.8 cm in length and 0.4 cm in caliber, was patent. The proximal pulmonary artery had an approximately 50-mm-long aneurysm. Eccentric cardiac hypertrophy was evident primarily in the right but to a lesser degree also in the left ventricle. Additionally, there was diffuse subendocardial fibrosis in the left and right ventricle. To the best of the authors' knowledge, patent ductus arteriosus was not previously described in buffalos. Since both calves were sired by the same bull, it is possible that this cardiac anomaly has a hereditary basis.


Subject(s)
Buffaloes , Ductus Arteriosus, Patent/veterinary , Animals , Ductus Arteriosus, Patent/pathology , Fatal Outcome , Female , Histocytochemistry/veterinary , Male
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