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Persistent ductus arteriosus in an elderly dog
Persistência do canal arterial em cão idoso
DOI:
https://doi.org/10.15446/rfmvz.v72n2.118715Keywords:
congenital heart disease, congenital defect, hemodynamics, ductal patency (en)enfermedad cardíaca congénita, defecto congénito, hemodinámica, permeabilidad ductal (es)
cardiopatia congênita, defeito congênito, hemodinâmica, patência ductal (pt)
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Patent ductus arteriosus (PDA) is characterized by the failure of complete closure of the communication between the aorta and the pulmonary trunk during the early stages of life and is frequently observed in young animals. This vascular connection originates from pulmonary non-functionality during the fetal period and should close shortly after birth. In the absence of complete closure, the patient becomes a carrier of PDA, often with hemodynamic consequences. The aim of the present case report is to describe a case of PDA in an elderly mixed-breed dog. A mixed-breed dog, approximately 12 years old, was referred for cardiological evaluation due to a history of excessive fatigue reported over the previous 60 days. Clinical and laboratory examinations revealed a continuous murmur localized over the pulmonary area. Additional diagnostic tests were requested for further investigation. On Doppler echocardiographic examination, the following findings were observed: continuous turbulent flow at the site of the ductus arteriosus in the pulmonary trunk (left-to-right shunting); a minimal ductal diameter ranging from approximately 4.3 to 5.7 mm; and no abnormalities in other cardiac structures. These findings confirmed the diagnosis of PDA. Given the presence of flow reversal, routine clinical monitoring was recommended.
A persistência do ducto arterioso (PDA) é caracterizada pela falha no fechamento completo da comunicação entre a artéria aorta e o tronco pulmonar durante os estágios iniciais de vida, sendo frequentemente observada em animais jovens. A ligação entre os vasos é derivada da afuncionalidade pulmonar no período fetal, que deveria ser ocluída logo após o nascimento e, na ausência de oclusão completa, o paciente se torna portador de PDA, geralmente com repercussão hemodinâmica. O objetivo do presente relato é descrever um caso de PDA em paciente sem raça definida idoso. Um cão, sem raça definida, com aproximadamente 12 anos de idade, foi encaminhado para avaliação cardiológica mediante histórico de cansaço excessivo, identificado há 60 dias. Ao exame clínico-laboratorial, constatou-se sopro contínuo em foco pulmonar. Exames complementares foram solicitados para maiores investigações. Ao exame ecodopplercardiográfico, notou-se: fluxo turbulento e contínuo em topografia do canal arterial no tronco pulmonar (direção esquerda-direita); diâmetro ductal mínimo de aproximadamente 4,3 – 5,7mm; demais estruturas sem alterações. Os achados foram conclusivos de PDA, e mediante a presença de reversão de fluxo, foi indicado apenas o monitoramento clínico rotineiro.
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Copyright (c) 2025 Fabiana Queiroz, Felipe Gaia de Sousa, Marcelo Londe, Juliana dos Santos Masiero, Ana Cristina Ribeiro Mendes Mendes, Suzane Beier
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