¹Department of Veterinary Surgery, Division of Veterinary Research, Obihiro University of Agriculture and Veterinary Medicine, 2-11 Inadacho Nishi, Obihiro-shi, Hokkaido, 080-8555, JAPAN
²Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, JAPAN DOI : 10.9775/kvfd.2020.24301 Atrial septal defect (ASD) is a relatively rare congenital heart disease in dogs. A radical treatment is defect closure under open heart or occlusion by intervention. Small dogs face challenges with either treatment. This case was an 8-month-old female Yorkshire Terrier, weighing 2.4 kg. She suffered from dyspnea due to deterioration of circulatory dynamics caused by ASD. An Amplatzer was positioned under thoracotomy, guided by three-dimensional transesophageal echocardiography. Postoperative recovery was quick and uneventful. Clinical symptoms disappeared and circulatory dynamics were stable after growth. This method is considered to be a useful treatment option for small dogs with ASD. Keywords : Atrial septal defect, Congenital heart defect, Small dog, Interventional cardiac procedures, 3D transesophageal echocardiography