{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,6]],"date-time":"2025-08-06T13:03:25Z","timestamp":1754485405436,"version":"3.41.2"},"reference-count":32,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,7,3]],"date-time":"2023-07-03T00:00:00Z","timestamp":1688342400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Vet. Sci."],"abstract":"<jats:p>A 7-year-old castrated male Pomeranian dog weighing 5\u2009kg presented with a right-sided continuous murmur without any clinical signs. Thoracic radiographs indicated cardiomegaly and right atrial (RA) bulging. Echocardiography revealed a tunnel originating from the right coronary sinus of Valsalva and terminating in the RA. Contrast echocardiography revealed pulmonary arteriovenous anastomoses. Computed tomography (CT) demonstrated a tortuous shunting vessel that originated from the aorta extending in a ventral direction, ran along the right ventricular wall, and was inserted into the RA. Based on these diagnostic findings, the dog was diagnosed with the aorta-RA tunnel. At the 1-year follow-up visit without treatment, the dog showed no significant change except for mild left ventricular volume overload and mildly decreased contractility. To the best of our knowledge, this is the first case report of an aorta-RA tunnel that has been described in detail using echocardiography and CT in a dog. In conclusion, the aorta-RA tunnel should be included in the clinical differential diagnoses if a right-sided continuous murmur is heard or shunt flow originating from the aortic root is identified.<\/jats:p>","DOI":"10.3389\/fvets.2023.1160390","type":"journal-article","created":{"date-parts":[[2023,7,3]],"date-time":"2023-07-03T08:20:23Z","timestamp":1688372423000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["Case report: Imaging features of aorta-right atrial tunnel in a dog using two-dimensional echocardiography and computed tomography"],"prefix":"10.3389","volume":"10","author":[{"given":"Geunha","family":"Kim","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yewon","family":"Ji","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ho-Gyun","family":"Jeong","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taekwon","family":"Lee","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kichang","family":"Lee","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hakyoung","family":"Yoon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2023,7,3]]},"reference":[{"volume-title":"Handbook of cardiac anatomy, physiology, and devices","year":"2010","author":"Iaizzo","key":"ref1"},{"key":"ref2","doi-asserted-by":"publisher","first-page":"1090","DOI":"10.1161\/CIRCULATIONAHA.107.714402","article-title":"Pathophysiology of congenital heart disease in the adult: part I: shunt lesions: part I: shunt","volume":"117","author":"Sommer","year":"2008","journal-title":"Circulation"},{"key":"ref3","doi-asserted-by":"publisher","first-page":"477","DOI":"10.1111\/j.1939-1676.2011.0711.x","article-title":"Retrospective review of congenital heart disease in 976 dogs","volume":"25","author":"Oliveira","year":"2011","journal-title":"J Vet Intern Med"},{"key":"ref4","doi-asserted-by":"publisher","first-page":"94","DOI":"10.1111\/j.1748-5827.1997.tb03326.x","article-title":"Retrospective study of congenital heart defects in 151 dogs","volume":"38","author":"Tidholm","year":"1997","journal-title":"J Small Anim Pract"},{"key":"ref5","doi-asserted-by":"publisher","first-page":"651","DOI":"10.21521\/mw.5784","article-title":"Congenital heart defects in dogs: a retrospective study of 301 dogs","volume":"73","author":"Garncarz","year":"2017","journal-title":"Med Weter"},{"key":"ref6","doi-asserted-by":"publisher","first-page":"137","DOI":"10.5326\/0410137","article-title":"Surgical correction of a partial atrioventricular septal defect with a ventricular septal defect in a dog","volume":"41","author":"Akiyama","year":"2005","journal-title":"J Am Anim Hosp Assoc"},{"key":"ref7","doi-asserted-by":"publisher","first-page":"17","DOI":"10.1111\/j.1748-5827.2002.tb00004.x","article-title":"Partial atrioventricular canal defect in a dog","volume":"43","author":"Santamarina","year":"2002","journal-title":"J Small Anim Pract"},{"key":"ref8","doi-asserted-by":"publisher","first-page":"179","DOI":"10.1111\/j.1439-0442.2006.00813.x","article-title":"Retrospective study of 156 atrial septal defects in dogs and cats (2001\u20132005)","volume":"53","author":"Chetboul","year":"2006","journal-title":"J Vet Med A Physiol Pathol Clin Med"},{"key":"ref9","doi-asserted-by":"publisher","first-page":"371","DOI":"10.1016\/j.jvc.2011.10.004","article-title":"Aortopulmonary window characterized with two- and three-dimensional echocardiogram in a dog","volume":"14","author":"Jung","year":"2012","journal-title":"J Vet Cardiol"},{"key":"ref10","doi-asserted-by":"publisher","first-page":"941","DOI":"10.1016\/s0022-5223(19)37702-5","article-title":"Aorta-right atrial communication","volume":"80","author":"Otero Coto","year":"1980","journal-title":"J Thorac Cardiovasc Surg"},{"key":"ref11","doi-asserted-by":"publisher","first-page":"841","DOI":"10.1016\/s0022-5223(19)35961-6","article-title":"Congenital aortico-right atrial communications. 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