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  • Title: The canine right caudal and accessory lobe pulmonary veins: revised anatomical description, clinical relevance, and embryological implications.
    Author: Holt DE, Cole SG, Anderson RB, Miscelis RR, Bridges CR.
    Journal: Anat Histol Embryol; 2005 Aug; 34(4):273-5. PubMed ID: 15996130.
    Abstract:
    Necropsy dissections were performed on nine dogs to provide an anatomical description of the right caudal and accessory lobe pulmonary veins. In all dogs, the pulmonary vein from the right caudal lung lobe initially paralleled the right caudal lung lobe bronchus, running cranially, medially, and ventrally. It diverged from the bronchus at the level of the pulmonary artery and bronchus of the accessory lung lobe. At this point, the pulmonary vein from the right caudal lung lobe coursed dorsal to the pulmonary artery and bronchus of the accessory lung lobe. Medial to the bronchus of the accessory lung lobe, it received the pulmonary vein from the accessory lung lobe on its ventral surface. Within the pericardium, this common venous trunk merged with the caudal aspect of the left atrium either with or immediately adjacent to the left caudal lobe pulmonary vein. These findings were corroborated during surgical dissection to achieve isolation of the heart in five dogs as part of an experimental study on intravascular gene delivery to the heart. These anatomical findings are relevant to clinical and experimental surgery and raise interesting questions about the embryological development of pulmonary veins in the dog.
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